Error Code P011C: What It Means & What To Do?

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Always make sure that there should be no faults in the intake air temperature sensor 1 and it should function properly. Now the question which would be there in your mind is “WHY?” The answer to this is that if you will not take care of this, then OBD Code P011C would set up.

The engine control module would detect a state that the difference between the temperature of the intake air temperature sensor 2 and its estimated temperature calculated by the engine control module from the intake air temperature 1 as well as turbocharger boost sensor.

The OBD P011C can be defined as a Charge Air Temperature/ Intake Air Temperature Correlation. The charge air temperature sensor measures the overall temperature of the air which is going through the charge air cooler. The main function of the intake air temperature sensor is to measure the temperature of the air which is going into the car engine. The two readings that would determine if sensors are reading properly and correctly are compared by engine control module. If the PCM determines that there is an irrational reading in one of the sensors, then the P011C error code would appear.

What causes this problem with the Charge Air Temperature/Intake Air Temperature Correlation Bank 1?

• There can be some faults in the intake air temperature sensor 1
• Defects in the intake air temperature sensor 2
• IAT Sensor 1 or IAT Sensor 2 harness may be opened or shorted
• Bad electrical connection in the IAT Sensor 1 or IAT Sensor 2 circuit

1. Intake air Temperature Sensor - Do you remember when was the last time you got your car Intake air Temperature Sensor check-up? A damaged Intake air Temperature Sensor can cause a lot of issues like displaying P011C code.
2. Mass Air Flow Sensor - Everything is fine with turbocharger/supercharger and still P011C code triggering? Then you must get your Mass Air Flow Sensor.
3. Engine Control Module - A lot of issues can arise do to defective Engine Control Module. Did you just see P011C code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
4. Thermistor - Common cause behind this P011C error code can be some fault in Thermistor. So, it will be a good decision to replace them now.
5. Powertrain Control Module - The P011C code can also arise due to some issues in Powertrain Control Module. So, it is advised to replace them as soon as possible.

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P011C code by mentioning some major symptoms below:

Common Symptoms

• Decrease in the overall engine performance
• Excessive rich or lean exhaust
• Delayed engine start-up. This can occur especially during cold
• The fuel efficiency may start diminishing

Have a look at some ways with which you can correct the P011C code:

• The intake air temperature sensor 1 should be repaired or replaced
• Replace the engine control module

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Before you start to diagnose P011C fault code, you must have some basic diagnostic tools like a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable vehicle information source.

Make sure that you begin diagnosing this CAT sensor related code by checking that there should be no obstructions in air flow across the intercooler.

The next step is to visually inspect all CAT/IAT system wiring and connectors as they should be in order and there should be no obstructions by the intercooler and the car air filter should be clean. These repairs should be made as per the requirement.

The other step is to connect the scanner to the vehicle diagnostic port and all the stored codes should be retrieved as well as freeze frame data. Freeze frame data could be best described as a snapshot of the exact circumstances which were occurring at the time of the malfunction which led to the stored code P011C. You can always note down this information as it would be helpful during the proceeding of the diagnosis.

Common Mistakes When Diagnosing the P011C Code

• Failure in the charge air temperature
• There can be some default in the intake air temperature sensor
• Powertrain Control Module may start failing
• Some wiring issues can also arise

P011D - Charge Air Temperature/Intake Air Temperature Correlation Bank 2