P0597 Engine Coolant Thermostat Heater Control Circuit? (Solved)

What the P0597 code means. If a PCM (Powertrain Control Module) stores this code, it’s because the engine’s thermostat is experiencing an issue with the control voltage. The control circuit is most likely either open or short.

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  • The P0597 trouble code signifies that a thermostat heater control circuit is open. What the P0597 code means If a PCM (Powertrain Control Module) stores this code, it’s because the engine’s thermostat is experiencing an issue with the control voltage.

What does it mean thermostat heater control circuit open?

This fault refers to a problem in the system where the control voltage is nonexistent. An electronically controlled thermostat is composed of multiple temperature and load sensors, a computer program, and a control housing with a built-in thermostat.

What is a engine coolant thermostat heater?

Any liquid-cooled car engine has a small device called the thermostat that sits between the engine and the radiator. Its job is to block the flow of coolant to the radiator until the engine has warmed up. When the engine is cold, no coolant flows through the engine.

What happens if a heater control circuit is high?

When high voltage is found in the heater control circuit, the ECM triggers a Check Engine Light on the dashboard. In some circumstances, the vehicle may exhibit lower than normal fuel economy and run poorly.

How much does it cost to replace a BMW thermostat?

BMW 328i Thermostat Replacement Cost Estimate. Labor costs are estimated between $179 and $225 while parts are priced between $282 and $296.

What does P2181 code mean?

Diagnostic trouble code (DTC) P2181 stands for “ Cooling System Performance.” It is triggered when the powertrain control module (PCM) detects that the coolant temperature in the radiator and engine is outside of the normal range (too hot or too cold).

What is a thermostat circuit?

This gadget is set to turn on or off an air conditioning, balances the heat of a system, and also allows you to dictate what the temperature should be set. This article discusses electronic thermostat circuit working, types and its applications.

What does P00B7 code mean?

Diagnostic trouble code (DTC) P00B7 stands for “ Engine Coolant Flow Low/Performance.” This code is logged when the powertrain control module (PCM) perceives insufficient coolant flow through the cooling system. Code P00B7 may register if the PCM perceives insufficient coolant flow through the cooling system.

What is BMW thermostat?

A BMW thermostat controls the flow of coolant from your BMW engine through the radiator. Only then does the BMW thermostat open and allows coolant to move through your radiator for engine cooling, adjusting flow rate to ensure safe operating temperatures under all conditions.

Is it OK to drive with a thermostat stuck open?

Yes, the engine will just take longer to warm up than it would if the thermostat was functioning normally and I wouldn’t do it in cold weather for any length of time. Anyway, thermostats are a cheap part and are (used to be) simple enough to replace. Yes, a car can be driven with a thermostat stuck open.

What are the symptoms of a bad thermostat?

5 Symptoms of a Bad Thermostat (and Replacement Cost)

  • #1 – Temperature Gauge Reading Higher (or Lower) Than Normal.
  • #2 – Sudden Air Temperature Changes Inside Vehicle.
  • #3 – Coolant Leaking.
  • #4 – Rumbling Noises.
  • #5 – Heater Malfunction.

Can you run a car without a thermostat?

A car without a thermostat would never even warm to operating temperature, much less overheat. The lack of a thermostat would create a constant flow of coolant through the engine, thus a constant cooling effect on the engine. In this case though, the thermostat is not present, so this would not be a problem.

How do I fix code P0136?

What repairs can fix the P0136 code?

  1. Replacing the O2 sensor for bank 1 sensor 2.
  2. Repairing or replacing the wiring or connection to the O2 sensor for bank 1 sensor 2.
  3. Repairing exhaust leaks or a damaged catalyst.

What does control circuit high mean?

Error Code P0629 is defined as Fuel Pump A Control Circuit High. This means there’s a problem with the “A” control circuit in the fuel pump, which is caused by bad connectors/wires or defective CAN bus.

Error Code P0597: Thermostat Heater Control Circuit Open

The Thermostat Heater Control Circuit Open error code P0597 is described as Thermostat Heater Control Circuit Open. This is a general fault code that applies to all cars equipped with an OBD-II system, particularly those models manufactured from 1996 to the current day and using the same thermostatic control as the vehicle in question. It’s very frequent in German-made automobiles, such as those manufactured by Audi, BMW, Jaguar, Mercedes-Benz, Mini, Opel, and Volkswagen. Of course, the specifications for the definition, diagnostics, and repairs differ from one make and model to the next depending on the manufacturer.

In order to operate, an electronically controlled thermostat must be equipped with various temperature and load sensors as well as a computer program and control housing that includes a built-in thermostat.

Using a part throttle helps to increase fuel efficiency while also lowering pollution.

It keeps an eye on and regulates the temperature of the engine to ensure that it does not overheat or suffer from any potential difficulties.

Most likely, the control circuit is open or shorted.

Common Symptoms

It is common for the symptoms of this code to differ depending on the location of the thermostat at the time of the failure. However, in the majority of situations, there is little to no improvement in the vehicle’s overall performance and drivability after the upgrade. In some circumstances, the following symptoms will manifest themselves:

Possible Causes

There are a variety of probable explanations for this code, and in many situations, it is caused by an electrical connector that is not functioning properly. As a result, corroded or loose connections and wires are the most often seen causes of this code. Among the other probable causes are:

  • A faulty thermostat
  • A leak in the cooling system
  • The wire harness in the thermostat is either open or shorted
  • Failure of a Motronic computer (a uncommon occurrence)

How to Check

Coolant leaks due to a faulty thermostat. The wire harness in the thermostat has been opened or shorted; The failure of a Motronic computer (which is extremely unusual).

Advanced Diagnosis

Then, using the temperature probe, check the temperature of the engine’s internal combustion engine. Start the engine, and then check the voltage on the Motronic side of the harness by pressing the test button (refer to the instructions from the service manual). Tests should be continued if the results are within acceptable ranges. It is necessary to replace the Motronic Unit if there is no voltage or if the voltage is outside of the acceptable range.

Comparing the resistance on the thermostat side of the harness at the thermostat will be the next step. If the resistance is outside of the acceptable range, the thermostatic unit must be changed.

How to Fix

The following are examples of frequent repairs for this code, depending on the diagnosis:

  • Circuitry that has been damaged should be cleaned or replaced. Temperature sensor replacement, coolant leakage repair or replacement, and Motronic Unit replacement are all possible options.

If you have the right tools, debugging this code may be an easy process. If you don’t have the proper tools, it’s advisable to take your car to a reputable repair shop for an in-depth examination.

P0597 Thermostat Heater Control Circuit Open DTC

Don Bowman contributed to this article. Thermostat Heater Control Circuit Is Open, Says ASE Certified Automotive Technician

What does that mean?

As a general powertrain diagnostic problem code (DTC), it applies to all makes and models manufactured from 1996 onwards, regardless of manufacturer. The particular troubleshooting steps, on the other hand, will differ from car to vehicle. The codes P0597, P0598, and P0599 all relate to a thermostat that is regulated electronically in the engine. They are general codes, which means that they apply to all cars that use this form of thermostatic control. However, only a small number of manufacturers use this sort of thermostatic control system at this time.

The P0597 engine code indicates that a failure has occurred in this system, indicating that the control voltage is not present at this time.

Temperature and load sensors, a computer software, and a control housing with an integrated thermostat are all components of an electronically-controlled thermostat.

Concept

As a general powertrain diagnostic problem code (DTC), it applies to all makes and models manufactured from 1996 forward. Specific troubleshooting steps, on the other hand, will differ based on the car in question. The P0597, P0598, and P0599 error codes all pertain to an engine thermostat that is regulated electronically. It is a general code, which means that it applies to all cars that use this type of thermostatic control system. However, only a small number of manufacturers use this type of thermostatic control system.

The P0597 engine code indicates that a failure has occurred in this system, indicating that the control voltage is not present at all times.

Temperature and load sensors, a computer software, and a control housing with an integrated thermostat are all components of an electronically controlled thermostat.

Symptoms

It is possible that the symptoms will alter depending on where the thermostat was located at the time of failure; nevertheless, it is doubtful that there will be any visible difference in the way that the vehicle operates.

  • In this case, the check engine light will illuminate, and one of the codes listed above will be set. If the thermostat fails in the halfway closed position, the temperature gauge may show an unnaturally high reading
  • Conversely, if the thermostat fails in the fully open position, the temperature gauge may show a lower reading than normal.
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Potential Causes

According to past experience, the problem is frequently caused by a loose or corroded electrical contact, or the thermostat itself is faulty if it is driven by electricity.

The Motronic (engine management) computer can malfunction on rare occasions, however this is the least likely source of failure.

  • An improperly connected or corroded thermostat connection. The code will be activated if there is a coolant leak. The thermostat has malfunctioned on its own
  • The wire harness between the computer and thermostat has been compromised by a short or an open. The Motronic computer has failed
  • The system is down.

Diagnostic and Repair Procedures for P0597 Code

  • Remove the electrical connector and thoroughly check it. Scrape away any corrosion that has formed using baking soda or a wire brush. Apply electrical grease to the connection and check that it is secure
  • Check the level of coolant in the radiator to ensure that it is adequate. Low coolant levels will set a code by causing the electronic thermostat to overheat, which will result in an error message. Remove the electrical connector from the thermostat and measure the resistance readings on the device. This method will necessitate the use of a service manual or the acquisition of relevant information from the internet.

Identification of the pins and their locations, the color of the wires, pin values in volts at certain temperatures, and resistances are all required in this information. The values and flow of the diagnosis differ from one manufacturer to the next, as well as depending on the engine size. You’ll also need an infrared temperature probe and a volt/ohmmeter to complete this project.

  • With the help of the temperature probe, determine the temperature of the engine. Start the engine and check the voltage on the Motronic side of the harness in accordance with the manufacturer’s specifications. If the results are within acceptable limits, continue testing. If there was no voltage or if it was out of range, the Motronic unit should be replaced. Compare the resistance on the thermostat side of the harness to the resistance on the thermostat side of the harness. If the resistance is outside of the acceptable range, the thermostatic unit should be replaced. If the essential tools are not easily available, the car should be taken to a reputable repair shop that has access to the relevant knowledge. It is a straightforward diagnosis if the proper techniques are used.

P0597 MINI Repair Video

On YouTube, we discovered this video demonstrating how to fix the P0597. We have no affiliation with the creator of this video; it is provided solely as an extra resource for those who are experiencing this DTC. The procedure is illustrated for a Mini, but it may be comparable for other car makes and models.

Related DTC Discussions

  • P0597 is the error code for the Chevy Aveo 2010. P0597 is the error code. The error message ‘Thermostat heater control circuit / open’ has shown. Should I replace the thermostat because of this issue, or is it possible that the wires or the computer are malfunctioning? Does it seem like there’s a method to determine what the actual problem is? Is it necessary to replace the complete thermostat unit (thermosta
  • Urgent)? Codes p0597 and p0115 for the Vectra C Coolent Sercuit Thermostat Out of Range (P0597) was the reading I received. As a result, I replaced the temperature sensor. Now I’m receiving the error p0115, and based on what I’ve read, it appears to be the same problem. What do I need to do to get rid of the error p0115? It’s a vectra c 1.8 sri, and I need some help. P0597 is the BMW diagnostic code. The engine warning light illuminates on my BMW 1 series 2008, and I’m not sure what it means. P0597 is the code that is produced by the onboard diagnostics system. Is it a problem, and what should I do next, please? Cruze Chevrolet P2096 and p0597 diagnostic trouble codes My 2012 Chevrolet Cruze LS is displaying the codes p 2096 (Post catalyst fuel trim system low limit) and p0597 (Engine coolant thermostat heating control circuit), yet the vehicle continues to operate normally. This emerged when I had a coolant leaking problem and had to repair a coolant pipe on my car. Please advise on the various causes of the BMW P0597n error code. The check engine light is illuminated. On my 2013 BMW X5 35i, I have the code p0597. I measured the resistance of the sensor and it is 15 ohms, just like the replacement one I purchased but did not install. I have battery voltage on both wires when they are attached, but only on one when they are removed
  • It appears that I may have an open ground to even
  • What do you think?

Need more help with a p0597 code?

If you still need assistance with the P0597 error code, please submit your issue in our FREE vehicle repair forums. Thanks for visiting. Please keep in mind that this material is being provided solely for informational reasons. It is not meant to be used as repair advice, and we are not liable for any actions you take in relation to any vehicle. All of the information on this website is protected by intellectual property rights.

P0597 – Thermostat heater control system -circuit open – TroubleCodes.net

Trouble Code Fault Location Probable Cause
P0597 Thermostat heater control system -circuit open Wiring, relay, thermostat heater

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What Does Code P0597Mean?

Fault code for the OBD II ‘Thermostat heater control system -circuit open’ is the definition of the P0597 generic code, which is set when the PCM (Powertrain Control Module) detects an open circuit (loss of continuity) in the heater control circuit of an electrically assisted thermostat, also known as a ‘mapped’ thermostat, by the PCM (Powertrain Control Module). Notably, while this technology is widely used in Europe, it has recently become more frequent in North America and other regions, indicating that the market for this technology is expanding.

However, these thermostats are limited to two basic modes of operation that are both linked to the thermostat’s design, or control range.

As a practical matter, there is no such thing as an intermediate stage: if your cooling system is fully operational, your thermostat will open at its minimum design temperature, and from that point on, your thermostat will keep the coolant temperature at or close to the maximum allowable temperature until the engine is turned off and the circulation of coolant is terminated.

For example, at engine temperatures lower than roughly 185 0 F (85 0 C), greater engine power may be generated since engine knock is decreased and ignition timing can be adjusted at these temperatures, which is particularly important under high engine load situations.

At higher engine temperatures (up to around 230 0 F/110 0 C), combustion is significantly more efficient, and this is especially true under low engine load circumstances, such as those seen during low-speed city driving at very modest throttle openings.

As a result, by adjusting the engine temperature in response to driving circumstances, emissions may be lowered dramatically without compromising either fuel efficiency or engine power, and this is precisely what a mapped, or electrically assisted thermostat accomplishes to accomplish this.

With input data such as engine speed, throttle position, intake air and engine coolant temperatures (among others), the PCM can determine operating conditions, and thus a suitable thermostat setting, to bring the engine temperature into a range where emissions can be reduced without sacrificing fuel economy or engine efficiency.

This allows the thermostat to open at its maximum design temperature (typically about 220°F or 110°C) for a shorter period of time, improving fuel economy and emissions while reducing engine warm-up times.

This lowers the engine temperature to approximately 185° F (85° C), which in turn improves overall engine performance.

It should be evident from the foregoing that, in order for a mapped thermostat to function effectively, its electrical control circuits must be in excellent operating condition as well.

On the initial failure, whether or not a warning light is lighted will be determined primarily by the application, as well as by the particular reason of the open circuit.

Where is the P0597sensor located?

The simplified schematic of a mapped thermostat is seen in the figure above. It should be noted that, while all mapped thermostats use the same fundamental components, the actual look of these thermostats varies widely from application to application. However, because the introduction of mapped thermostats did not need any significant changes in the design or operation of engines or cooling systems, these thermostats are often installed in the same locations as traditional thermostats were previously.

The most straightforward method of locating the thermostat if a repair manual for the affected application is not available is to locate the bottom radiator hose and trace this hose back to the engine, where the hose will typically terminate in a plastic or aluminum housing/casing that encloses the thermostat.

Nonetheless, a mapped cooling system may be distinguished by the presence of an electrical connector on the thermostat housing, which makes it simpler to find the real thermostat inside the cooling system when the system is mapped.

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What are the common causes of code P0597?

The simplified schematic of a mapped thermostat is seen in the illustration to the right. Note that, while all mapped thermostats have the same fundamental components, the actual look of these thermostats varies widely from one application to the other. However, because the introduction of mapped thermostats did not necessitate any significant changes in the design or operation of engines or cooling systems, these thermostats are often installed in the same locations as traditional thermostats were previously found in the vehicles.

The most straightforward method of locating the thermostat if a repair manual for the affected application is not available is to locate the bottom radiator hose and trace it back to the engine, where the hose will typically terminate in a plastic or aluminum housing/casing that encloses the thermostat.

Nonetheless, a mapped cooling system may be distinguished by the presence of an electrical connector on the thermostat housing, which makes it simpler to find the real thermostat within the cooling system when the system is reassembled.

a.

  • Wire or connections between the thermostat and the PCM that are damaged, scorched, shorted, disconnected, or corroded The thermostat’s heating element is faulty. Engine coolant sensor(s) that are not working properly
  • PCM has failed or is failing. Note that this is an extremely unusual incident, and that the defect must thus be located before any control module is changed.

BAT Team Discussions for P0597

  • PO597 Mini Cooper Hatchback from 2012. Greetings, Scuba John. Could you perhaps begin by making a post in the relevant part of this website? For example, domestics or imports, little engines or big equipment are all options. In such case, please tell us about your car/truck/Harley Davidson/Tonka toy, including the year, manufacture, and model. For some manufacturers, the code P0597 may indicate a problem.

P0597 Engine Coolant Thermostat Heater Control Circuit

A heated thermostat is used in
late-model engines. It is possible that the thermostat, heater, wire harness, electrical connector, or the thermostat housing itself are malfunctioning when a P0597 Engine Coolant Thermostat Heater Control Circuit Trouble code is shown.

Why use a heated thermostat?

Car manufacturers often install smaller turbocharged engines in their vehicles in order to reduce vehicle weight while simultaneously improving gas efficiency and pollutants. In cold weather, these smaller engines can run hotter while the turbocharger is engaged, but they may not be able to generate enough heat to adequately warm the passenger compartment when the car is at idle. Cabin heating is improved in a variety of ways by automobile manufacturers. In order to decrease heat loss from the engine coolant, some people rely on a radiator shutter mechanism to impede airflow over the radiator.

As a result, automakers include a heating element in the thermostat to expedite the opening of the thermostat and so deliver the best cooling possible.

Everything from the thermostat to the housing, heater, and sensor is included in a single unit.

Using a pulse width modulated power source, the PCM monitors coolant temperature at the sensor and regulates how much heat should be applied to the wax pellet in the thermostat in order to speed up the opening time.

What causes a P0597?

The heated thermostat in a General Motors car is housed in a plastic casing. This item has an extremely high failure rate, according to the shops, which they attribute to poor design in the plastic casing. Aftermarket providers have established that the plastic housing has a fragile structure, a tiny tube diameter, and a small gasket groove, all of which contribute to its poor performance. Dorman Products and Gates both provide an enhanced part that may be used to replace the original factory design, respectively.

The Gates 34710 has been redesigned with a metal enclosure.

Diagnose and fix P0597

It is incorporated inside the plastic casing of GM automobiles that the heated thermostat is located. Due to poor design in the plastic housing, retailers are claiming an extremely high failure rate for this item. A poor construction, a short tube diameter, and an inadequate gasket groove have been identified as the plastic housing’s flaws by aftermarket providers. In order to replace the factory design, both Dorman Products and Gates provide an updated component.

Plastic thermostat housing with a heating element developed by General Motors The metal enclosure of the Gates 34710 has been redesigned. A revised heated thermostat and housing for Dorman 902 033 were introduced.

P0597 Diagnostic steps:

  1. Remove the thermostat housing’s electrical connection from the housing. Make a visual inspection for corrosion or coolant infiltration, as well as bent pins.

2) Inspect the fuse that is connected to the thermostat heater. Rick Muscoplat’s 2017 Rick Muscoplat’s Rick Muscoplat posted a blog entry on

Check engine light code p0597

Despite the fact that I believe I posted an update, I cannot locate it. I’ll write again, but please forgive me if the original post appears in the same place. It was revealed to me today, when I drove the car to the dealer (Flow Mini of Raleigh), that I had forgotten to reconnect one of the two electrical connections to the thermostat housing. Although it cost me $110, they also washed my car, which was a nice bonus. It took me around 3 hours to replace the thermostat housing on the computer.

  • It is true that I have the Bentley handbook, but the photographs are of low quality, and the step-by-step directions are inadequate.
  • Step 1: Park the car on the ramps.
  • Coolant should be drained.
  • Removing the air filter box and related ductwork (you’ll need star bit sockets or a star bit screw driver for this) is Step 2.
  • Disconnect any electrical connections you come across.
  • However, it is possible that you will not be able to rejoin them.
  • I yanked it straight up off its mounting bracket so I could shift it around to have access to the hose clamps underneath.

When I put everything back together, it was as simple as snapping back on.

Remove the hoses from the thermostat.

There will be a spillage of coolant.

Remove the pin-like object from the backmost big hose.

If you put it on correctly, it will slip on effortlessly.

Step 6: Reassemble all of the pieces of equipment.

Step 7: Refill the coolant reservoir.

Fill the tank with water.

It required little more than a gallon of 50-50 mix to complete the project.

I’m sure there are other posts about replacing coolant, so I won’t go into detail about it here.

Overall, it wasn’t too difficult.

Moreover, it took a few minutes along the way to find out how items were attached in order to figure out how to unattach them. However, I believe that anyone who is mechanically inclined should be able to do this task.

Thermostat problems (P0597)

However, there is no sign of an update that I made. It is possible that the initial post will appear again, so please bear with me. It was revealed to me today, when I drove the car to the dealer (Flow Mini of Raleigh), that I had neglected to reconnect one of the two electrical connections to the thermostat housing. After all, they also cleaned my car for an additional $110. The replacement of the thermostat housing took around 3 hours. There is no need for any super-specialized tools. It is true that I have the Bentley handbook, but the graphics are of low quality, and the step-by-step directions are inadequate.

  1. Putting the car on the ramps is the first step.
  2. Disconnecting and draining the radiator’s main pipe, which runs from the top to bottom, was my first step.
  3. The duct connection at the grill is a little difficult to figure out and took a few minutes.
  4. I was under the impression that they should be color marked, but it appears that they are matched such that you can’t put them back together wrong.
  5. Third, there is a plastic enclosure with electrical lines that is right in front of the thermostat housing, preventing it from being accessed.
  6. Although I did take the front of the plastic housing off first, it isn’t clear if I was required to do so.
  7. Placing a second bucket beneath the engine beneath the thermostat is Step 4.

The number of them is a large number.

Undo the three bolts that keep the device together in the fifth and final step.

Make sure to pay close attention to how it comes out since it has to be put back in exactly the same manner.

Remove the thermostat from its mounting brackets now.

REMEMBER TO INCLUDE THE LOWER CONNECTOR IN YOUR DESIGN!

Refill the coolant reservoir with fresh water.

Fill the tank with water or other liquid.

Approximately one gallon of 50-50 mixture was required.

Changing coolant is something that I am sure has already been discussed elsewhere, so I will not get into it here.

The task was not difficult in general.

Moreover, it required a few minutes along the way to figure out how items were attached in order to be able to disassemble them. It should be possible, in my opinion, for everyone with a mechanically minded mind.

OBD Engine Code Error P0597

P0597 Acura OBD Error Code P0597 Honda OBD Error Code P0597 Mitsubishi OBD Error Code
P0597 Audi OBD Error Code P0597 Hyundai OBD Error Code P0597 Nissan OBD Error Code
P0597 BMW OBD Error Code P0597 Infiniti OBD Error Code P0597 Porsche OBD Error Code
P0597 Buick OBD Error Code P0597 Jaguar OBD Error Code P0597 Saab OBD Error Code
P0597 Cadillac OBD Error Code P0597 Jeep OBD Error Code P0597 Scion OBD Error Code
P0597 Chevrolet OBD Error Code P0597 Kia OBD Error Code P0597 Subaru OBD Error Code
P0597 Chrysler OBD Error Code P0597 Lexus OBD Error Code P0597 Toyota OBD Error Code
P0597 Dodge OBD Error Code P0597 Lincoln OBD Error Code P0597 Vauxhall OBD Error Code
P0597 Ford OBD Error Code P0597 Mazda OBD Error Code P0597 Volkswagen OBD Error Code
P0597 GMC OBD Error Code P0597 Mercedes OBD Error Code P0597 Volvo OBD Error Code
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Spark 2015 obdc p0597 code

I thought I had submitted an update, but I can’t seem to find one. I’ll write again, but please bear with me if the original post appears as well. It was revealed to me today, when I drove the car to the dealership (Flow Mini of Raleigh), that I had forgotten to reconnect one of the two electrical connections to the thermostat housing. That cost me $110, but hey, they also cleaned my car, so it was worth it. It took me around 3 hours to replace the thermostat housing. There is no need for any super-special tools.

  1. It is simply useful for getting a broad notion of what to accomplish.
  2. DISEMBLE THE BATTERY.
  3. I removed the main line that runs down the bottom of the radiator and emptied the water into a pail.
  4. The duct connection at the grill is a little tough to figure out and takes a few minutes.
  5. I was under the impression that they should be color labeled, but it appears that they are all matched such that you can’t put them back together wrongly.
  6. Step 3: There is a plastic enclosure with electrical lines right in front of the thermostat housing, preventing access to it.
  7. I removed the front of the plastic casing first, although I’m not sure it was necessary.

Step 4: Place a second bucket under the engine, just below the thermostat.

There are a large number of them.

Step 5: Remove the three bolts that keep the device in place.

Pay close attention to how it comes out because it has to be put back in exactly the same manner.

You may now remove the thermostat.

MAKE SURE YOU DO NOT FORGET THE LOWER CONNECTOR!

I used a Zerex G-05 for this project.

It took many minutes of squeezing and filling the tank with coolant before I was able to get all of the air out.

Check for leaks and run the engine until it is warm and cool before topping up the tank.

Step 8: Remove all codes.

It was tough to get pliers on several of the hose clamps since they were in an unusual starting position.

And it took a few minutes along the way to find out how things were attached in order to figure out how to unattach them. However, I believe that anyone with a mechanical aptitude should be able to do this task.

P0597 BUICK Code Thermostat Heater Control Circuit Open ( Will trigger check engine light and won’t go away unless replaced).

You are currently using an out-of-date web browser. It is possible that this or other websites will not show correctly. You need either upgrade your browser or switch to another one. 1133Buick Ownership2013 Enduring Excellence If you’re obtaining this error number, it means that your OEM thermostat was poorly constructed. It’s a straightforward fix. It’s positioned under the air cleaner boot on the 2013 1.4L model year. To gain access to the petcock, remove the protective plate from below the vehicle.

  1. Remove the boot from the air cleaner.
  2. It’s the part that really connects to the aluminum tube in the video, as indicated.
  3. That hose has a clip that needs to be slid out in order for it to be removed.
  4. Housing replacements may be bought for $25-$30 on the internet, and they are far better than the housing you are replacing.
  5. Mine was busted, but it still functions perfectly.
  6. Mine was really simple to take off and put back on again.
  7. The one on the bottom right is a little more difficult to identify and remove, but it is completely achievable with a little patience.

Finally, you’ll need to slip the smaller bottom hose off, which will be much simpler if you have a long hose clamp plier on hand to help you.

However, there was very little slack in that hose, and getting it down and off was the most difficult aspect of the entire procedure.

Reinstalling the bottom right bolt is considerably easier than removing the bolt from the bottom.

pounds).

Reattach the hoses, paying close attention to the clip on the large top hose, and tighten them down.

Replug the connection into its original position.

Reattach the wire harness and the air-cleaner boot to the air-cleaner.

Hopefully, you were able to capture the old and recycle it if it was still in good condition.

To begin, start the engine and check for leaks, then burp the system one or two more times as needed.

done.

Here’s a fantastic video that covers the entire subject: The most recent revision was made on: Interested in updating and upgrading your Buick luxury vehicle? Look no farther than right here at our very own forum store – where orders are mailed out the same day they are placed!

Vauxhall Workshop Manuals > Astra J > Engine > Engine Cooling > Other Information

Engine Coolant Thermostat Heater Control Circuit (P0597 00): DTC P0597 00 The DTC P0598 00 indicates that the Engine Coolant Thermostat Heater Control Circuit is operating at a low voltage. A DTC of P0599 00 indicates that the engine coolant thermostat heater control circuit is operating at a high voltage.

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Control High P0597 00, P0598 00 P0597 00, P0598 00
Control Low P0598 00 P0598 00 P0597 00, P0599 00

Circuit/System Description

It is controlled by the engine control module (ECM), which is a pulse width modulated (PWM) thermostat. The engine coolant thermostat heater regulates the flow of coolant while also controlling the operating temperature of the engine. The thermostat is powered by the ECM, which provides 12 V. The engine control module (ECM) regulates the engine coolant thermostat heater by connecting the control circuit to ground with a solid state device known as a driver. The driver is fitted with a feedback circuit that is brought up to a voltage by the driver’s control circuit.

Conditions for Running the DTC

DTC P0597 00, P0598 00, and P0599 00 run continuously once the above conditions are met.

Conditions for Setting the DTC

The pulse width modulated (PWM) thermostat is controlled by the engine control module (ECM). Temperature management and regulation of the engine operating temperature are accomplished by the engine coolant thermostat heater. Powered by an ECM, a thermostat receives 12 V. When the engine coolant thermostat heater is turned on, the ECM grounds the control circuit with a solid state device known as a driver, which is controlled by the ECM. The driver is fitted with a feedback circuit that is pushed up to a voltage by the driver’s input signal.

Action Taken When the DTC Sets

The DTCs P0597 00, P0598 00, and P0599 00 are all Type B fault codes.

Conditions for Clearing the DTC

It is possible to get Type B DTCs with the DTCs P0597 00-P0598 00-P0599 00.

Diagnostic Aids

Type B DTCs include P0597 00, P0598 00, and P0599 00.

Reference Information

The DTCs P0597 00, P0598 00, and P0599 00 are all Type B DTCs.

Connector End View Reference

Views of the Component Connector at the End

Electrical Information Reference

Define the many types of powertrain diagnostic trouble codes (DTCs).

Scan Tool Reference

References to Control Modules that include scan tool information

Circuit/System Verification

Check to see that the DTC does not reset when the vehicle is being operated in the conditions for running the DTC. Alternatively, you may choose to run the vehicle under the conditions that you saw from the freeze frame/failure record data.

Circuit/System Testing

  1. With the ignition turned off, unplug the harness connector at the E41 Engine Coolant Thermostat Heater
  2. And Check that a test bulb shines between the control circuit terminal 2 and the ground connection after turning on the ignition.
If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

Inspect the connection between the control circuit terminal 1 and ground to ensure that a test bulb does not ignite.

If the test lamp illuminates, test the control circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

Disconnect the X1 harness connector at the K20 Engine Control Module when the ignition is turned off. Inspect the connection between the control circuit terminal 43 X1 and ground for infinite resistance.

If less than the specified value, test the control circuit for a short to ground.

Make sure there is less than 5 between the control circuit terminal 43 X1 at the K20 Engine Control Module harness connection and the terminal 1 at the E41 Engine Coolant Thermostat Heater harness connector on the K20 Engine Control Module.

If greater than the specified value, test the control circuit for an open/high resistance.

If all circuits pass the test, the E41 Engine Coolant Thermostat Heater should be replaced.

Repair Instructions

Perform theDiagnostic Repair Verification after completing the diagnostic procedure.

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