P011D - OBD Trouble Code

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Did your mechanic just tell you that there are some faults in the intake air temperature sensor 1? Or is he saying that the IAT Sensor 1 or IAT Sensor 2 circuit is facing bad electrical connection? Then there are chances that OBD Error Code P011D mat start triggering.

It is a generic powertrain diagnostic trouble code which would generally apply to all the OBD-II vehicles. It may include, but is not limited to the vehicles from Nissan, Toyota, Chevrolet, GMC Dodge and many more. The steps for repairing would vary from one vehicle make/model to another.

The OBD P011D can be described as an Charge Air Temperature/ Intake Air Temperature Correlation. The overall temperature of the coolant going through the engine is measured with the engine coolant temperature sensor. 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 P011D trouble code would start appearing.

What causes this problem with the Charge Air Temperature/Intake Air Temperature Correlation Bank 2?

• 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
• IAT Sensor 1 or IAT Sensor 2 circuit may start facing bad electrical connection

1. Intake air Temperature Sensor - The P011D code can also arise due to some issues in Intake air Temperature Sensor. So, it is advised to replace them as soon as possible.
2. Mass Air Flow Sensor - Mass Air Flow Sensor is an important car part which should never be neglected. May be there is some fault in it due to which P011D code may start flashing.
3. Engine Control Module - There can be some defects in the Engine Control Module due to which P011D code may come on again and again. Make sure to replace it or else you may have to face some major issues.
4. Thermistor - OBD Error Code P011D can simply be due to faulty Thermistor. Replace old and damage components now!
5. Powertrain Control Module - Did your mechanic just found out that there is some fault in the Powertrain Control Module? Buy top notch Powertrain Control Module from us at economical prices.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily. Have a look at some of the symptoms of P011D code:

Common Symptoms

• The engine performance may start decreasing
• The issue of excessive rich or lean exhaust
• The engine start-up may start delaying. This can happen especially when cold
• The overall fuel efficiency may start diminishing

Have a look at some ways with which you can correct the P011D code:

• The wiring and connectors should be visually inspected
• You can always check for wirings and replace them it needed

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The first and the foremost step before you start to diagnose P011D 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.

After that you must 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 P011D. You can always note down this information as it would be help you a lot during the process of the diagnosis.

Common Mistakes When Diagnosing the P011D Code

• Failure in the charge air temperature
• Intake Air Temperature sensor may start failing
• Defects in the Powertrain Control Module
• There can be some wiring issues

P011C - Charge Air Temperature/Intake Air Temperature Correlation Bank 1