Guide To P00AA OBD Error Code Solutions

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A sudden increase in the fuel consumption and the engine performance along with occasional engine stalling and not starting with improper throttle response may be an indication of problem with the Air intake system hampering the engine’s performance, thus indicating OBD Code P00AA.

OBD-II Code Decreased engine performance is defined as a Intake Air Temperature Sensor 1 Circuit

The IAT (Intake Air Temperature) sensor is a thermistor, which measures the air temperature by detecting resistance in the air. It's located in the intake air ductwork but can be located in the intake manifold in some vehicles. Being a two-wire sensor, it is supplied with a 5-volt reference wire from the PCM (Powertrain Control Module) and a ground wire. The passing air changes resistance on passing over the sensor. The powertrain control module (PCM) monitors this change and calculates air temperature to help operate the engine at the most efficient point possible at any given temperature.

What causes the problem with the IAT Sensor Circuit?

• Intake Air Temperature sensor and circuit being faulty or damaged
• Wiring and harness related to the sensor are short or broken
• Poor electrical connection to the Intake Manifold
• PCM being faulty and taking wrong readings
• Clogged/broken intake/inlet pipe
• Damaged or fault in MAF (Mass Airflow Sensor)

1. Air Temperature Sensor - The Air Temperature measures the air exposed to the engine which is an important step in combustion, and plays a crucial role in the engine performance. Replace faulty sensor immediately.
2. Air Intake Kits - Check the air intake system to maintain the proper air to fuel ratio and enable proper functioning of the engine. Buy quality air intake kits from us and replace the damaged kits now!
3. MAF Sensor - Check and replace the Mass Air Flow sensor, if found faulty as it hampers the engine performance.
4. Engine Control Module - OBD Error Code P00AA can flash due to faulty ECM and thus it is important to replace those damaged components immediately.
5. Powertrain Control Module - P00AA error code also relates to problems with the powertrain. Find all the Powertrain related parts with us.
6. Diagnostic Tool - In order to detect the OBD error, one needs professional diagnostic tools. Visit us today to buy professional scan tools now!

OBD Code P00AA may flash due to variable air temperature entering the engine as well as problem with the temperature sensors and circuits. There is typically an illuminated Check Engine light as well. At Parts Avatar Canada get genuine auto parts for your vehicle at the most competitive prices. This error may also indicate problems that will likely affect:

Common Symptoms

• Check Engine Light will illuminate indicating error P00AA code by the PCM
• Engine lacks power and reduces performance and acceleration
• Increased fuel consumption due to problem in fuel delivery system
• Unusual throttle response and stalling

Some of the common fixes for the problems in the OBD Code P00AA for all makes and models are as follows;

• Check the placement of IAT and hasn't been dislodged. Use a scan tool & check for IAT reading with KOEO (Key on engine off). If the engine is cold, the IAT reading should be the same as the CTS (Coolant temperature sensor) reading.
• Replace the sensor, if the resistance of the IAT sensor isn't within specs for both the sensors.
• Check for faulty wiring and harness leading to faulty sensor reading and circuit problems.
• If the wiring are correct, then you must focus on the PCM next. Although it’s rare to be faulty but can need reprogramming.

P00AA is properly diagnosed with an advanced scan tool capable of factory sensor readings (not just one from an auto parts store). A qualified technician can read the data from the advanced scan tool to determine when the problem occurred, or if it is still occurring. They may clear the code/light and test drive the vehicle while monitoring the scan tool data to see if the fault returns or is present.

Based upon the conditions of the test, possibly clearing the code, and road testing the car while monitoring the data, further diagnosis may be required. Diagnosis may require multiple tools such as:

• A technician typically begins by hooking the vehicle up to an OBD-II scanner in order to verify that the code is present, and check for other codes.
• This data along with freeze frame data is recorded, and the codes are then cleared to see if they reoccur.
• Next, there should be a visual inspection of the wiring and connectors to check for loose connections, corrosion, or shorts.
• Replacement of Damaged wiring/connections to the IAT (Intake Air Temperature) Sensor
• Repair faulty PCM sensor that may require reprogramming.
• Replace Leaky and damaged intake/inlet pipe immediately
• Faulty MAF (Mass Airflow Sensor) needs replacement as it directly hampers the engine performance.

Common Mistakes When Diagnosing OBD Code P00AA

By far, the most common cause of a P00AA being stored is a disconnected #2 IAT sensor connector on bank 2. When the air filter is checked or replaced, the IAT sensor is often left disconnected. If your vehicle has recently been service, and a code P00AA is suddenly stored, suspect that the IAT sensor has simply been left unplugged.

Some of the common mistakes done while diagnosing the OBD code P00AA are:

• Directly replacing the IAT sensor without evaluation
• Simply replacing the Powertrain Control Module (PCM) without considering other possibilities of problem
• Not checking the damaged or loosened wiring and circuit problems