P2096, Escape, Focus, Fusion? (Solution)

  • Some 2013-2014 Focus ST, Fusion, Escape and MKZ vehicles equipped with a 2.0L gasoline turbocharged directinjection (GTDI) engine and built on 9/1/2012 and through 8/1/2013 may exhibit an illuminated malfunction indicator lamp(MIL) with diagnostic trouble code (DTC) P2096 (post catalyst fuel trim system too lean bank 1) stored in powertraincontrol module (PCM) memory. This may be due to engine oil migrating from the variable valve timing (VVT) oil controlsolenoids through the engine wire harness

How do I fix code P2096?

What repairs can fix the P2096 code?

  1. Repairing a vacuum or other hose/line leak.
  2. Replacing the catalytic converter.
  3. Replacing the fuel filter, fuel pump, or fuel pressure regulator.
  4. Replacing the oxygen or mass airflow sensor.
  5. Replacing the spark plugs.

Can bad fuel cause P2096?

In most cases, a P2096 code is the result of too much air in the system or a lack of fuel being released. Either way, this means the air-to-fuel ratio will be too high.

What does diagnostic code P2096 mean?

Code P2096 stands for “ Post Catalyst Fuel Trim System Too Lean (Bank 1) ”. The PCM keeps track of the fuel mixture ratio through oxygen sensors in the exhaust system that measure the amount of oxygen burned by the engine. There is an oxygen sensor positioned before and after the catalytic converter.

Can an exhaust leak cause a P2096 code?

I would repair the exhaust leak before attempting to troubleshoot fault code P2096. It’s very possible that the exhaust leak is causing the code. When a positive ‘pressure pulse’ of exhaust leaves the head, a negative pressure pulse (vacuum) follows it out of the exhaust port into the exhaust manifold.

Can running lean damage an engine?

In combustion engines, ‘running lean’ goes beyond using gas efficiently. In effect, that status makes the engine perform with less gasoline than it needs to operate properly, and it increase the amount of friction between the engine’s moving parts. Running lean can damage an engine.

How do I fix code P0137?

What repairs can fix the P0137 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 before the sensor.

What is code P2098?

Diagnostic trouble code (DTC) stands for “P2098 Post Catalyst Fuel Trim System Too Lean (Bank 2). ” It means the exhaust stream on the bank 2 side contains higher oxygen levels exiting the converter than it should.

Can a vacuum leak cause O2 sensor code?

The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean. An engine misfire, leaky exhaust valve or a leak in the exhaust manifold gasket that allows air into the exhaust may also cause this type of code to be set.

What causes code P0138?

When trouble code P0138 is set, this indicates that there is a high voltage (steadily above. 9 volts) for more than 10 seconds indicating a lack of oxygen in the exhaust stream and an abundance of fuel at sensor 2 on the bank 1 of the engine.

How do I fix code P0138?

What repairs can fix the P0138 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. Replacing the catalyst in front of the sensor.
  4. Repairing a leaking injector.

P2096, Escape, Focus, Fusion

Ford has issued a service bulletin16-0101 to fix the P2096 problem code that can be found on the following cars. Ford has discovered that motor oil may migrate from the variable valve timing (VVT) oil management solenoids and flow through the engine wiring harness to the catalyst monitor sensor. Ford is investigating this possibility (CMS).


Vehicles affected

Escape, concentration, and fusion were the themes of the 2013-2014 season. 2013-2014 Lincoln MKZEngine: 2.0L GTDI produced between September 1, 2012 and August 8, 2013.

Symptoms of P2096

Code for troubleshooting It is stored in the PCM as the code P2096 (post catalyst fuel trim system too lean bank 1). If your car has a 2.0L GTDI engine and was manufactured between September 1, 2012, and August 8, 2013, do not replace the catalytic converter. Using a multimeter, check the electrical contacts at the VVT oil control solenoids and the CMS for corrosion. In search of evidence of motor oil is what you’re doing. Wipe the connections with a clean paper towel after each use. Removing and replacing the VVT oil control solenoids, CMS, and wire harness are required if there is oil contamination.

Remove the PCM from a Focus ST.

New part numbers are as follows: CU5Z-12A581-MA Wiring Harness – This is a type of wiring harness (2013 Focus ST) DU5Z-12A581-CA The Fusion/MKZ wiring harness is for the 2013-2014 model year.

AABolt – Rear Driveshaft Bolt With Washer – (Fusion/MKZ/Escape AWD) – 6 Required 5F9Z-4682-AABolt – Rear Driveshaft Bolt With Washer – (Fusion/MKZ/Escape AWD) W711806-S442Bolt – Rear Driveshaft Center Bearing – (Escape AWD) – 4 Required W711806-S442Bolt – Rear Driveshaft Center Bearing – (Escape AWD) XL-1 Penetration and Lock LubricantXL-2 by Motorcraft® High Temperature Nickel Anti-Seize LubricantTA-30 manufactured by Motorcraft® ZC-31-B Silicone Gasket and Sealant from Motorcraft®.

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Ford Fusion P2096: Post Catalyst Fuel Trim System → Too Lean → Bank 1

It is important to note that P2096 is a general OBD II code, which means it has the same significance for the Ford Fusion as it would for any other car. It explicitly means that your Fusion has discovered that it is operating at an insufficiently efficient level (too much air for the amount of fuel present). It is the side of the engine that has the first spark plug in the firing sequence that is referred to as Bank 1. If your Fusion is equipped with a four-cylinder engine, you won’t have to worry about this.

P2096 Symptoms:Ford Fusion

Typically, if your Fusion has the P2096 error code, you may notice some apparent symptoms. Here are a few of the most often encountered:

  • Uneven Engine Performance– If the engine in your Fusion is running a touch too lean, you may notice that the vehicle struggles to idle correctly. It may also have misfiring and have difficulty accelerating
  • P2096 is known to knock loudly
  • This is a regular occurrence. The presence of a bright red catalytic converter is a clear sign that the converter has failed
  • However, this is not always the case. The reason you’re here is because your check engine light has come on. P2096 can be caused by a broad variety of issues. Make sure to look at the other codes as well. When this code is present, the fuel economy will nearly always be reduced since the air fuel combination is incorrect.
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P2096 Causes + Diagnosis:Ford Fusion

The following are the most common causes of P2096. A decent code scanner will be of great assistance in the diagnosis. Most of the time, this code will be accompanied by additional codes that can assist you in narrowing down the actual cause of the problem. Due to the large number of things that might go wrong and cause the code to be generated, diagnosing P2096 on its own can be difficult. It is necessary to cross-reference the common causes with any other codes that may be present in order to determine what common causes they have in common.

Oxygen Sensor

An oxygen sensor that has failed is one of the most prevalent causes of the P2096 error code. In order to identify whether the sensor is defective or not, you must test it. More information on identifying a malfunctioning oxygen sensor in your Fusion may be found here.

Catalytic Converter

A blocked catalytic converter is one of the most prevalent causes of the P2096 code. A converter that is severely damaged will light red, and your Fusion will have difficulty accelerating. The reason for this is because the system has become so congested that it is no longer able to flow exhaust gas freely. If this is the case, you will most likely receive the error code P0420. More information on diagnosing a faulty catalytic converter may be found here.


P2096 will be generated if there is a misfire. It is not necessary for a misfiring engine to produce a notable splutter sound. It might be so faint that you don’t even notice it when driving your Fusion, but it is there. A misfire-related difficulty code will almost always be present if this is the source of the error code if this is true. Here are some of the most often used: In this case, the P0300 code indicates that something is causing all of the plugs to misfire randomly. This is more difficult to correct than a single misfire on a random cylinder, but it is absolutely not impossible.

P030 X –Misfire in Cylinder X: If this is the case, it indicates that the misfire is in a specific cylinder.

Low Fuel Pressure

P2096 can be caused by low fuel pressure.

Furthermore, there are a variety of factors that might contribute to low fuel pressure. As an example:

  • Fuel Injector(s) not working
  • Fuel Pressure Regulator not working
  • Fuel Filter clogged
  • Fuel Pump not working

Exhaust Leak

An exhaust leak can cause the oxygen sensors to signal that the mixture is excessively lean, which can cause the engine to misfire. It is rather simple to check for an exhaust leak. Your Fusion will produce a louder-than-usual exhaust note somewhere in the exhaust system, and it’s generally rather audible. Exhaust Leak on a Ford Fusion

Vacuum Leak

Unwanted air might enter the combustion chamber through a vacuum leak if the vacuum seal is not properly sealed. This thins down the mixture and has the potential to cause a code to be thrown in your Fusion.

Mass Airflow Sensor

If there is a problem with the mass airflow sensor, the PCM will not be able to manage the air fuel mixture effectively.

Conclusion: P2096 Ford Fusion

It is likely that this code will be accompanied by another difficulty code that is connected to it. If it isn’t, start with the less difficult tasks:

  • If the vehicle is not accelerating properly but does not appear to be misfiring, the catalytic converter is most likely to blame. The sensation of running out of wind should rise in intensity as the pace increases. The possibility of an unregistered misfire exists if your Fusion is running rough (tachometer needle movement at idle). It’s likely that you have a vacuum leak if you hear a whistling sound coming from beneath the hood. If there appear to be no other symptoms other than the check engine light, it has been reported that poor gas might cause this code to be generated on its own. Always use the octane grade that Ford recommends for your vehicle. Check the performance of the oxygen sensor with a code scanner while driving in real-world conditions. If the readings are becoming unpredictable, it may be necessary to replace it. First, inspect the wire surrounding it to ensure that it is secure and free of damage

Good luck with your Ford Fusion’s diagnosis. Please leave a remark if you come across something that you think would be of use to the next visitor to this website. Thank you very much.

P2096 Code Post Catalyst Fuel Trim System Too Lean Bank 1

Don Bowman contributed to this article. Technical Post by an ASE Certified Automotive Technician Catalyst Fuel Trim System is too lean Bank 1.

What does that mean?

This is a general powertrain code, which means it applies to all makes and models from 1996 and onward. The particular troubleshooting steps, on the other hand, will differ from car to vehicle. After reading the code P2096, post catalyst fuel trim system too lean on bank 1, it is clear that the PCM identified a lean (too much air and not enough fuel) condition according to the inputs from the oxygen sensors. When using a four- or straight-six-cylinder engine with a single exhaust, Bank 1 has no significance.

  1. A number of oxygen sensors in the exhaust system provide continuous feedback on the fuel mixture proportion.
  2. Engine management computers get information from oxygen sensors on the quantity of oxygen present in the exhaust, which is used to determine and control the fuel-to-air mixture.
  3. It accomplishes this by a succession of pulses known as ‘cross counts.’ On the tip of the sensor, there is zirconium that reacts to oxygen in such a manner that, when heated, it generates its own electrical voltage.
  4. When in operation, the oxygen sensor will cycle once per second and deliver a voltage to the computer that ranges from 0.2 for a lean mixture to 0.8 for a rich mixture, depending on the conditions.
  5. The computer is aiming for a fuel-to-air ratio of 14.7:1.
  6. There are two purposes for oxygen sensors: first, to show the presence of unburned oxygen in the exhaust, and second, to tell how well the catalytic converter is performing its job.
  7. A larger count on the front sensor than the rear sensor indicates that the converter is operational when the sensors and converter are functioning properly.
  8. This code may or may not be evident, depending on whether or not the check engine light is illuminated.

Whatever the source, there isn’t anything that can go wrong on a car without having a detrimental influence on anything else as well. Determine the source of the problem and repair the code as quickly as possible to prevent damage to any other components from occurring.


P2096 code symptoms will vary depending on whatever component or system is causing the interruption in the fuel trim to occur. Not everyone will be present at the same time.

  • P2096 DTC set with the Malfunction Indicator Lamp (MIL) illuminated. Rough idling. Poor fuel efficiency. Poor acceleration. Misfire. Catalytic converter that is cherry red hot. The possibility of spark knock (detonation or pre-ignition)
  • Additional codes linked with the P2096
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Potential Causes

The following are possible reasons of this DTC:

  • The lack of fuel pressure can be caused by several factors such as clogging of the air/fuel filter, failure of the fuel pump, failure of the fuel pressure regulator, or clogging or leakage of the injectors. Because to misfiring plugs, the engine has a rough running characteristic. Several engines feature misfire codes that identify which cylinder was affected, such as P0304 for cylinder number 4. As a result of a significant vacuum loss, a significant volume of unmetered air would reach the intake manifold, resulting in an excessively lean mixture. It is also possible to have a lean mixture due to a big air leak at or near the number one oxygen sensor. A plugged converter will result in a slew of driveability issues, as well as the activation of this code. An extremely clogged converter will prevent the engine from increasing its rotational speed while under load. If the converter indicates a malfunctioning converter, look for a code such as P0420, which means catalytic converter efficiency is below the threshold. A malfunctioning oxygen sensor. While this will immediately generate a code, a defective oxygen sensor does not automatically rule out the sensor as a source of failure. The code simply indicates that the sensor signal did not meet the required criteria. An erroneous signal will be produced by an air leak or any of the other factors listed above. There are a plethora of O2 codes that relate to oxygen performance, which may be used to pinpoint the source of the problem
  • The Mass Airflow sensor can also be the source of the problem. An error code such as P0100- Mass Airflow Circuit Malfunction would be shown alongside it. This sensor is a hot wire that detects the volume of air entering the intake manifold through the intake manifold. This information is used by the computer to manage the fuel mixture. Air leaks are caused by rusted exhaust systems, fractured exhaust manifolds, damaged or missing gaskets or donuts, and other factors.

Consider the following scenario in order to illustrate the relationship between cause and effect on automobiles. Even a small air leak in front of the number one oxygen sensor will introduce more air into the mixture that will not be accounted for by the computer. Because of the unmetered air, the oxygen sensor indicates that the mixture is lean. In order to avoid harm from a lean mixture, the computer immediately enriches the mixture to prevent detonation and other reasons from causing damage.

Those are only a few examples of the events that can take place under these circumstances.

Diagnostic and Repair Procedures

In order to obtain the technical service bulletins (TSBs) linked with these codes, as well as a description, it is a good idea to go online. Despite the fact that all cars are affected by the same set of faults, some may have a service history of issues with a specific component connected with this code. A high-tech diagnostic scan tool, such as a Tech II or a Snap-On Vantage, will save you a significant amount of time in this situation. The scanner has the capability of graphing and displaying digital information on the performance of each sensor in real time.

Jeeps and some Chrysler vehicles appear to be plagued with faulty electrical connectors, so be sure to properly examine them.

The guarantee covers the reprogramming of the updates as well as the replacement of the oxygen sensor for any reason within the warranty’s eight-year/80,000-mile period.

If it hasn’t been done yet, it is free for the time period stated above.

  • Make sure the code scanner is connected to the OBD port under the dashboard. With the engine off, turn the key to the ‘On’ position. When you hit the ‘Read’ button, the codes appear on the screen. Cross-reference any extra codes with the code sheet that comes with the product. First and foremost, pay attention to these codes
  • In the absence of further codes equivalent to codes P2096 or P2098, test drive the car and seek for tell-tale signs of a problem. This code will be triggered by fuel contamination. Using a higher quality of gasoline will provide more power. If the car has very little power and has problems accelerating, examine underneath the vehicle while the engine is running. Normally, a blocked converter would emit a red glow
  • However, this is not always the case. Check for vacuum leaks between the Mass Airflow Sensor and the intake manifold in the engine’s intake manifold. Many times, leaks produce a whistle-like sound. Restore any leaks and clear the code
  • If the engine indicates a miss but no code was present, figure out which cylinder is misfiring and repair or replace it. As long as the exhaust manifold is visible, a little amount of water should be sprayed or poured into each cylinder exhaust port. The water will evaporate instantly on the good cylinders and slowly on the missing cylinder, depending on the temperature. Pulling the plugs and inspecting their condition
  • Checking the plug wires to verify sure they are not burned or resting on the exhaust
  • And inspecting the exhaust system are all options if this cannot be performed. Check for rust holes, gaskets that are missing, cracks, or looseness. Raise the car and, using a 7/8-inch wrench, check that the oxygen sensor is securely fastened. Inspect the wire harness and connector
  • If a code for the Mass Airflow sensor is shown, make sure the sensor’s connector is in good working order. If everything is in working order, replace the MAF sensor. The oxygen sensor downstream of the catalytic converter on the side of the engine with the number -1 cylinder has to be replaced when the code P2096 is encountered. Additionally, if an oxygen sensor code indicates ‘heater circuit malfunction,’ it is highly likely that the sensor has failed.
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Related DTC Discussions

  • P2096 is the engine code. Chrysler PacificaP 2096 Chrysler Pacifica 3.5 engine, 2004 Chrysler Pacifica When this code appeared a few years ago, I changed both O2 sensors and everything was good for about 9 months. Then the code reappeared and the upstream o2 sensor functioned for approximately ten months before the code reappeared and the sensor was replaced with a new one and everything was normal again. The code came up in the wrong place
  • On the Chevrolet Orlando 1.8, the code P2096 is shown. Hello everyone, I have a P2096 error number that I cleared and then it showed back again. The diagnostics reveal that the LTFT is negative 7 and that the STFT is in the negative zone throughout the bulk of the scan, ranging from – 0.8 to – 9.0 at times. A leap between 0 and the maximum 700 range is observed in O2S1B1, while a run in the 700 range is observed in O2S2. There are no power difficulties with the automobile
  • P2096 for the 2010 Mazda CX7 2.3L I need assistance with my 2010 Mazda CX7 2.3L, which has three codes that are all the same. When I took it to a store, they informed me I needed an upstream oxygen sensor, which I did. The next day, the light came back on, and I had no idea what to do. P2096P2270 Hello, I failed the emission test with CO 0.64 percent (maximum 0.2 percent), the fault codes in the obd are P2096P2270, and the vehicle was not registered. What should I do in order to resolve this situation? Thanks
  • Codes for the stratus p0133, p0138, and p2096 are listed below. Currently, I own a Dodge Stratos 2005 with a 2.7L 6-cylinder engine. P0133 o2 sensor 1/1 delayed response, p0138 o2 circuit high voltage, and p2096 down stream fuel system lean 1/2 are the three errors that keep popping up on my computer. I suppose my issue is whether all of these scripts represent a single problem or whether they represent a number of individual problems.
  • 2010 Mazda6 V6 P2096 and P2270
  • I don’t appear to be able to Hello there, perhaps someone can provide some guidance before I spend additional money at a repair business. The above-mentioned trouble codes are present in my 2010 Mazda6 V6. P2026 The post-catalytic fuel trim system is too lean for the bank. Oxygen sensor signal is trapped in the lean bank (P2070). P0411 P0137 P2096 P0301 P2270 is the only one that has shown up since the beginning of the test cycle, however the test cycle appears to be incomplete
  • The other three are also showing up. So far, I’ve changed the Downstream Oxygen Sensor as well as the secondary air intake control valve on the vehicle. I’m having trouble deciding what to do next. Can anyone assist me? I’m a do-it-yourselfer who’s also on a tight budget. I need to pass smog this month so that I can get back to work
  • I have a 2008 Ram 4.7L with P2096 and P2098 codes, and I’m wondering if anybody has ever encountered these before? The P2096 code on my 2005 Hyundai Accent has confused me and I’ve done everything I can think of, including calling my local store. Hello and welcome to everyone. I own a three-door Hyundai Accent GS from 2005. Normally, my car runs well and takes me to and from work, but recently, the check engine light (CEL) began to illuminate around two weeks ago, and after scanning my ECU, I received the code P2096, along with an extra code. TDI: $02
  • TDI:$38. I don’t feel this is a huge issue, but I’d want to see it addressed
  • P2096 hello everyone, when I examined the Dodge automobile, the carman scan tool said that there was a p2096 code! What exactly does that mean?

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