- What is a P00B7 Chevy Cruze trouble code? A P00B7 Chevy Cruze Engine Coolant Flow Insufficient trouble code can set when the ECM detects a temperature difference of more than 68°F between the radiator coolant temperature sensor (RCT) and the engine coolant temperature sensor (ECT).
How do I fix code P00B7?
How To Correct P00B7 Engine Coolant Flow Low/Performance
- Ensure that the coolant is filled to a proper level.
- Replace the Engine Coolant Temperature sensor and/or Radiator Coolant Temperature Sensor if found faulty.
- Replacement of damaged or faulty thermostat.
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.
How many temperature sensors does a Chevy Cruze have?
Which one Your 2011 Chevrolet Cruze actually has two temperature sensors, and they’re both located on the radiator, but one on the driver’s side, and one on the passenger’s side.
Why does my Chevy Cruze keep overheating?
The most common reasons a Chevrolet Cruze is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat. Coolant leak (water pump, radiator, hose etc.)
How do I know if my coolant temperature sensor is bad?
Bad Coolant Temperature Sensor Symptoms
- Check Engine Light.
- Poor Mileage.
- Electrical Cooling Fans not coming on.
- Black Smoke from the Exhaust Pipe.
- Difficult Starting Condition.
- Engine Overheats.
- Poor Idling.
- Poor Engine performance.
Where is coolant temperature sensor?
On most vehicles, the coolant temperature sensor (CTS) can be found somewhere near the engine thermostat, which allows it to function optimally. The tip of the CTS is probably located right next to the engine coolant.
What does engine code P0128 mean?
Code P0128 stands for Engine Coolant Temperature Below Thermostat Regulating Temperature. It means that the ECM/PCM has “noticed” that the engine coolant temperature is consistently running below thermostat regulating temperature. In other words, the engine is running cooler than it should.
What is engine coolant?
A coolant (also called an antifreeze) is a special fluid that runs through your engine to keep it within its correct operating temperature range. It is made from either ethylene glycol or propylene, water, some protection additives and is usually green, blue or even pink in colour.
Where is the temperature sensor located on a Chevy Cruze?
The engine coolant temperature sensor on a Chevy Cruze is located in the coolant flange to the left of the cylinder head.
What is the normal coolant temperature for a 2012 Chevy Cruze?
The coolant temperature on a Chevy Cruze should be anywhere between 190 to 225 degrees Fahrenheit. The engine coolant is overheating if it’s around 240 to 250 degrees. If Your coolant gets to this temperature it will set an engine light.
What does Code 4 mean on a 2011 Chevy Cruze?
Fault code P0004 (or, as You’ve said here, code 4) on the 2011 Chevrolet Cruze indicates that Your fuel volume regulator control circuit is high. This, in turn, indicates an electrical problem within the fuel volume regulator.
How can I cool down my engine fast?
Put your car in neutral or park and then rev the engine. This makes the fan and the water pump work faster, which pulls more air and more water through your car’s radiator. This increased circulation cools down the engine.
Can a bad temperature sensor cause overheating?
Engine Overheating If the coolant temperature sensor malfunctions, it could cause your car engine to get overheated. While sometimes a faulty sensor sends a permanent cold signal to the engine, it can also send a permanent hot signal.
Can you use water instead of coolant?
Water by itself can’t do the job of antifreeze due to its lack of boiling and freezing point range and its inability to protect your vehicle’s engine. Plus, it doesn’t absorb heat as effectively. In the case of an absolute emergency, you can use water in your coolant rank.
P00B7 Chevy Cruze
Greetings: Currently, I am the owner of a 2003 Ford Explorer Limited V6 4 Flex Fuel with around 142K miles on the clock. I noticed that my truck was having difficulty starting around 6 months ago. It will not flip over no matter how much you push it. Every light turns on, the beeping begins, and the engine revs and revs but does not catch. Upon starting, it may stall out or make several unsuccessful attempts at stopping (the stalling out is not consistent). Starts up without any problems if the temperature outdoors is over 50 degrees Fahrenheit.
Once the temperature outdoors reaches 32 degrees, you can continue for up to 10 minutes.
As soon as it catches up with the rest of the pack, it will rev up on its own.
In my opinion, the only time it happens is when the engine is cold.
- A new fuel filter, a new fuel pump, a new idle air control valve motor, a new MAF sensor, and a fuel/induction cleaning have all been installed in this vehicle.
- A total of three diagnostics have been paid for by me.
- A gasoline pump relay was something I intended to install; however, I was informed that they were either functional or not functional.
- At an auto repair shop, I had the vehicle inspected.
- Battery: 12.78V at 765 CCA, as measured by a voltage meter 700 CCA is the rating for this model.
- The first test is as follows.
- No results were obtained from the charging system.
of data loaded 13.8 Amps of current are required.
14.14 Amperes Drainage Test (While doing the test, my spouse neglected to turn off a rear fan.) My starter, according to one mechanic, is on its way out and that I should start there first.
Do you have any ideas on what it may be and why it should be considered?
Somewhere in my cooling system, I believe, there is a coolant leak.
You’re the one who gets to start.
The upper and lower coolant housings are positioned in the leak, and the temperature sensor is likewise located in the leak.
On the other hand, there is no white residue found anyplace else on the engine. Throughout the home, I don’t notice any tears, rips, or cracks. Due to the fact that this item was already repaired around 2 years ago, I am not certain if it is just leaking. Thanks
What is an electric thermostat?
In order to get the power of a larger engine while also improving fuel economy, car manufacturers are installing smaller engines in conjunction with turbochargersElectric thermostat and housing used on tiny engines Because the engines are smaller in size, they may not create as much heat at idle as a larger or older engine of the same capacity. Additionally, short trip driving and limited heat output by the engine may prevent the thermostat from opening as soon as it might otherwise be the case.
- Traditional wax pellet thermostats are sluggish to respond to changes in the temperature of the engine coolant, making them ineffective.
- This is something that the newer electric thermostats are meant to address.
- The ECM is in charge of determining the pulsed current.
- When 12V power is added, the thermostat begins to open at 176°F, which is the set temperature.
- When determining whether pellet heating should be done by the engine coolant or the heater, the ECM considers the load circumstances and determines which method to use.
- As soon as you turn on your vehicle, your ECM begins monitoring the thermostat and compares the ECT readings to the RCT data to ensure that the thermostat is working within design specifications.
- That is not a sufficient cause to replace the thermostat on its own.
- When replacing the engine coolant, do not change the thermostat as part of the “regular” servicing.
Symptoms of P00B7 Chevy Cruze trouble code
Whenever a P00B7 Chevrolet Cruze problem code is displayed, you may observe that the radiator fans are operating at a high rate at all times when the engine is running. Due to the fact that the ECM has detected a significant enough differential in temperature between the ECT and RCT to decide that coolant flow is insufficient, the radiator fans are turned up to the maximum setting in order to prevent the engine from overheating.
Diagnose the P00B7 Chevy Cruze trouble code
- Make sure to check fuse F47, which is located in the underhood fuse box. This fuse is responsible for supplying electricity to the thermostat heater.
Chevy Cruze has an electric thermostat fuse47 in the underhood fuse box. 2. Check for battery voltage on the violet/dark blue wire at the thermostat heater, which is connected to the thermostat. 3. Inspect the dark blue wire that connects the ECM to the battery. You’re looking for wide spaces or short distances to the earth. In the event that you have a bi-directional scan tool, instruct the thermostat heater to operate at full capacity. Increase the idle speed to 3,000 revolutions per minute.
5. If the temperature does not drop to less than 185°F, the thermostat should be replaced. 6. After the repair is completed, clear the problem code to turn off the high-speed fans. In the year 2017, Rick Muscoplat is a professional musician. Rick Muscoplat posted a blog entry on
Major problems with my 2011 Cruze
The original post was made by msjack82 I’m having some of the same issues you’re facing. I’ve just had my automobile since February 2014, and it’s been a major source of frustration ever since. I phoned Chevy to see whether my powertrain warranty covered water pumps. It turns out it does. As a result, I had to pay to have it replaced after being informed that it didn’t. I argued that I believed it should be covered, but received no assistance. The dealership is of absolutely no assistance. I wish I hadn’t even taken a second look at this vehicle!
- I’ve had enough of this automobile.
- Do you know how many kilometers you have left?
- It’s not about thinking.
- Chevrolet Owners |
- Engine Engine coverage comprises all internally lubricated components, as well as the engine oil cooling hoses and lines, among other things.
- The cylinder head and block are also included in the package.
- Exclusions: Sensors, wiring, connections, the engine radiator, coolant hoses, coolant, and the heater core are all excluded from coverage under the powertrain warranty.
- The starting motor, the whole pressurized fuel system (including the in-tank fuel pump, pressure lines, fuel rail(s), regulator, injectors, and return line), as well as the Engine/Powertrain Control Module and/or module programming, are also omitted from the definition.
P00B7 Engine Coolant Flow Low/Performance
Stephen DarbyASE Certified TechnicianEngine Coolant Flow Low/Performance Article byStephen Darby
What does that mean?
This generic powertrain diagnostic problem code (DTC) is commonly seen in a large number of OBD-II automobiles and is described as follows: This may include, but is not limited to, automobiles from Chevrolet, Audi, Ford, Volkswagen, and other manufacturers. According to anecdotal evidence, this specific code appears to be more frequently encountered on Chevrolet / Chevy automobiles (Sonic, Aveo, Malibu, Spark, etc.). I’ve encountered the code P00B7 on several occasions, and it has always indicated that the powertrain control module (PCM) has noticed a mismatch in the correlating signals between the radiator coolant temperature sensor and the engine coolant temperature (ECT) sensor.
- It is occasionally necessary to monitor the temperature of the coolant in the radiator and compare it with the temperature of coolant in the engine cooling passages in order to ensure that coolant is flowing as intended between the radiator and the engine cooling passages.
- Brass is the most often used of these housing materials because to its long life and toughness.
- As coolant heats and flows through the ECT sensor, the degree of thermal resistance in the sensor reduces as well.
- As the engine cools, sensor resistance increases, and as a result, the voltage of the ECT sensor circuit (which connects to the PCM) decreases.
- Fuel supply and ignition timing strategy are two of the tasks that are influenced by the actual engine coolant temperature and data from the ECT sensor, which are both temperature sensors.
- It is usually installed in one of the radiator tanks, although it can alternatively be installed in a pressurized coolant reservoir.
For MIL illumination, it may be necessary to do many drive cycles with a failure.
What is the severity of this DTC?
Many OBD-II cars are affected by this generic powertrain diagnostic trouble code (DTC), which is often found in the powertrain. This may include, but is not limited to, automobiles from Chevrolet, Audi, Ford, and Volkswagen, among other manufacturers and models. According to anecdotal evidence, this specific code appears to be more frequently encountered on Chevrolet / Chevrolet automobiles (Sonic, Aveo, Malibu, Spark, etc.). I’ve encountered the code P00B7 on several occasions, and it has always indicated that the powertrain control module (PCM) has noticed a disparity between the correlating data from the radiator coolant temperature sensor and the engine coolant temperature (ECT) sensor.
- It is occasionally necessary to monitor the temperature of the coolant in the radiator and compare it with the temperature of coolant in the engine to ensure that coolant is flowing as planned between the radiator and engine cooling passageways.
- As a result of its longevity, brass is the most commonly used of these housing materials.
- As coolant heats and passes through the ECT sensor, the degree of thermal resistance in the sensor lowers.
- In response to cooling, sensor resistance increases, and the voltage across the ECT sensor circuit (which feeds data to the PCM) decreases.
- Real-time engine coolant temperature and data from the ECT sensor are two of the functions that are influenced by actual engine coolant temperature and sensor input.
- Most commonly, it is installed in one of the radiator tanks, although it can also be installed in a pressurized coolant reservoir.
- For MIL lighting, it is possible that many drive cycles with a failure will be necessary.
What are some of the symptoms of the code?
The following are possible symptoms of a P00B7 engine code:
- Excessively rich exhaust
- Poor driving characteristics
- Inadequate idle quality
- There has been a significant reduction in fuel economy.
What are some of the common causes of the code?
The following are possible causes of this engine code:
- The following problems: low coolant, stuck thermostat, defective ECT sensor, faulty radiator coolant temperature sensor Circuits or connections that are shorted or open
- PCM or PCM programming issue due to a bad PCM
What are some P00B7 troubleshooting steps?
Before attempting to diagnose any ECT sensor related errors that have been logged, make every effort to ensure that the engine is fully cooled and not overheated. Before continuing, make sure that the engine is fully topped off with coolant and that it is not overheating under any circumstances. It is also a good idea to start the engine cold and let the thermostat to open (while keeping an eye on the temperature gauge or scanner data display). To diagnose a code P00B7, you’ll need a trustworthy source of vehicle information, a diagnostic scanner, a digital volt/ohmmeter (DVOM), and an infrared thermometer with a laser pointer, among other tools and equipment.
- Connect the scanner to the car’s diagnostic port to be ready to extract all of the stored codes and freeze frame data from the vehicle.
- Clear the codes and test-drive the car to determine if the code has been reset after they have been cleared.
- Individual circuits and sensors can be tested with the DVOM if you have these tools available.
- Damage to the controller will be reduced as a result of this.
Connector pin-out charts and wiring diagrams are particularly useful for evaluating the voltage, resistance, and/or continuity of individual circuits. To test the radiator coolant temperature sensor and the ECT sensor, perform the following steps:
- The relevant component testing procedures/specifications, as well a wiring diagram, may be found by consulting the vehicle information source. Disconnect the sensor to be tested from the rest of the system. Set the DVOM’s resistance to the ohms preset
- To test each sensor, use the DVOM test leads in conjunction with your component testing specifications. Any sensor that does not meet the requirements set out by the manufacturer should be regarded faulty.
How to check for a reference voltage and a ground at the radiator coolant temperature sensor and the ECT sensor is described below:
- Connect the positive test lead of the DVOM to the reference voltage pin of each sensor connection when the key is turned on and the engine is turned off (KOEO)
- While the key is turned on and the engine is turned off The negative test lead should be used in conjunction with a ground pin on the same connection to determine ground continuity. Individual sensor connections should be checked for a reference voltage (usually 5 volts) and a ground.
How to check the temperature of the radiator coolant and the signal voltage of the ECT sensor:
- Reconnect the sensors if necessary. The positive test lead of the DVOM should be used to probe the signal circuit of each sensor. The negative test lead must be connected to the ground pin of the same connection or to a known good engine/battery ground to function properly. To verify that each of the sensors is receiving proper coolant temperature, use an infrared thermometer. To establish if each sensor is operating properly, you may either utilize the temperature to voltage chart (available inside the vehicle information source) or the data display on the scanner. Comparing the actual voltage and temperature with the target voltage and temperature is important. Each sensor should provide accurate readings of the real coolant temperature or voltage. If one of them does not, it is likely that the device is defective.
Sensors should be connected again. The positive test lead of the DVOM should be used to probe the signal circuit of each sensor, as shown. This means that the negative test lead must be connected to the ground pin of the same connection or to a known good engine or battery ground. Check the actual coolant temperature at each of the sensors using the infrared thermometer. Determine if each sensor is operating properly by examining the temperature to voltage chart (which may be accessed inside the vehicle information source) or the data display on the scanner; Comparing the actual voltage and temperature with the target voltage and temperature is essential.
It is possible that one or both of them are defective; however, this is unlikely.
- You might find it helpful to look for technical service bulletins (TSB) that are related to the vehicle’s make and model, as well as the symptoms and codes that have been saved.
Related DTC Discussions
- P00B7 Chevrolet CruzeHello, I’m receiving this code. I’ve changed two temperature sensors, but the code is still coming up. I’m in need of assistance.:oops: POOB7
- What does the code P00B7 on my 2009 Chevrolet Aveo signify, and how can I fix it? My used 2009 Chevrolet Aveo began to overheat significantly the day before yesterday, and the heater quit working. Although we went to AutoZone to have the OBD code examined, we were not given any particular. What may be producing the P00B7 error code?
Need more help with a P00B7 code?
The code P00B7 is shown on my Chevrolet Cruze. I have changed two temperature sensors, but the warning remains. POOB7, I’m in need of assistance. What does P00B7 signify on a 2009 Chevrolet Aveo, and how do I fix it? My used 2009 Chevrolet Aveo began to overheat significantly the day before yesterday, and the heater stopped producing heat immediately after that. We took our car to AutoZone to have the OBD code examined, but the results were vague. It’s possible that P00B7 is the source of the problem.