P00A5 OBD Error Code: Problem & 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 P00A5.

OBD-II Code Decreased engine performance is defined as an Intake Air Temperature Sensor 2 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 on 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. If the PCM detects a voltage out of normal operating range for the #2 sensor on bank 2, a P00A5 will set. Bank 2 is the side of the engine that does not contain cylinder #1.

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

1. Air Temperature Sensor - Damaged sensor affects the combustion process, and that is why this sensor plays a crucial role in the performance. Replace faulty sensor now!
2. Air Intake Kits - Faulty intake systems will not be able to maintain the proper air to fuel ratio and enable proper functioning of the engine. Buy quality air intake kits from us.
3. Coolant Temperature Sensor - The Coolant Temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and transmission shifting. Replace damaged sensors now!
4. Air Flow Sensor Connector - This sensor provides vital information regarding the air intake to the engine control unit. Replace faulty air flow sensor connectors with us!
5. Engine Control Module - OBD Error Code P00A5 can also be due to faulty ECMs. Replace faulty ECM components with us.
6. Powertrain Control Module - P00A5 error code also relates to problems with the powertrain that is not able to generate response in time causing distorted engine timing. Find all the Powertrain related parts with us.
7. Diagnostic Tool - Always use professional diagnostic tools to detect the problems in relation the specific OBD code. Visit us today to grab amazing deals.

OBD Code P00A5 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. Visit Parts Avatar Canada to 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 P00A5 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 P00A5 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 is correct, then you must focus on the PCM next. Although it’s rare to be faulty but can need reprogramming.

A qualified technician who has the knowledge of industrial grade diagnostic tools should be recommended for the diagnosis Error P00A5. Proper checks of the wirings and connectors as well as sensors, ECM/PCM fuel delivery system, transmission system, etc., should be done. Following are some diagnosis that you can focus on.

• IAT (Intake Air Temperature) Sensor replacement
• Damaged wiring/connections to the IAT (Intake Air Temperature) Sensor
• Repair PCM that may need reprogramming.
• Leaky and damaged intake/inlet pipe should be diagnosed immediately
• Replacing faulty MAF (Mass Airflow Sensor)

Common Mistakes When Diagnosing OBD Code P00A5

Some of the common mistakes done while changing diagnosing the OBD code P00A5 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