Error Code P00A8: What It Means & What To Do?

<<See All OBD Codes

Oftentimes, Engine Warning Light turns up almost immediately it senses the OBD code error. This directly impacts the engine performance as it struggles with power and acceleration as well as failed fuel system causing increased consumption of fuel by the engine.

OBD-II Code Decreased engine performance is defined as an Intake Air Temperature Sensor 2 Circuit High

This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. The powertrain control module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts for the #2 IAT sensor, it sets this P00A8 check engine light code. Bank 2 is the side of the engine that does not contain cylinder #1.

What causes the problem with the IAT Sensor Circuit?

• Problematic IAT (Intake Air Temperature) Sensor
• Faulty wiring/ connections to the IAT sensor and circuit
• PCM (Powertrain Control Module) fault in sensor
• Break in the intake/inlet pipe
• Intake/inlet pipeline getting clogged
• MAF (Mass Airflow Sensor) damaged

1. Engine Control Module - OBD Error Code P00A8 can simply be due to faulty ECM. Replace old and damage components now!
2. Powertrain Control Module - P00A8 error code also relates to problems with the powertrain control module. Find all the Powertrain related parts with us.
3. Catalytic Converter - Catalytic converters can overheat and get damaged. Replace your old catalytic converter now!
4. Diagnostic Tool - Choose from our wide variety of diagnostic tools to detect and correct the OBD code error.
5. Auto Switches & Sensors - Common causes behind that P00A8 error code can be defective switches or faulty sensors. So it will be a good decision to replace them now.
6. Air Temperature Sensor - The Air Temperature sensor are usually exposed to air entering the engine. As it is a very important step in combustion, this sensor plays a crucial role in the performance. Replace faulty sensor now!
7. Air Intake Kits - It is very important to check on 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.
8. Air Flow Sensor Connector - It is very important component as it provides vital information regarding the air intake to the engine control unit. Replace faulty connectors with us!

Since this code is likely points to the problem on the IAT circuit, there may not be any noticeable big symptoms at present and even if there are any can we considered as general problems by the driver. However, the MIL will likely be on and the car may exhibit some drivability problems.

• Replace faulty Intake Air Temperature Sensor and Circuit
• Repair or replace damaged wiring/connections to the IAT Sensor
• Replace PCM (Powertrain Control Module) if damaged and can also be reprogrammed if found faulty and tested again if the error reappears or not

P00A8 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:

• IAT (Intake Air Temperature) Sensor replacement if found faulty
• 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 P00A8

Some of the common mistakes done while changing diagnosing the OBD code P00A8 are:

• Improper assessment of the IAT sensor failure
• Simply replacing the Powertrain Control Module (PCM) without considering other possibilities of problem
• Not noticing the damaged or loosened wiring and circuit problems