P00AD OBD Error Code: Problem & Solutions

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Oftentimes, Engine Warning Light turns up almost immediately it senses the OBD code P00AD 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 1 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 P00AD 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 - Engine stalling or not starting, and check engine lights being on can be an indicative of OBD P00AD error code or some other code all together, if the ECM is faulty. Thus, it’s better to get the faulty electricals replaced as soon as possible.
2. Powertrain Control Module - Problems with the powertrain can lead to distorted engine timing, hence faulty components need to replaced. Find all the Powertrain related parts with us.
3. Diagnostic Tool - Choose from our wide variety of diagnostic tools to detect and correct the OBD code error from us.
4. Auto Switches & Sensors - Defective switches or faulty sensors can be a simple indicative of any OBD error. So, it’s important to replace them first.
5. Air Temperature Sensor - The Air Temperature sensor is important component that takes into consideration, the air temperature as it enters the engine for combustion process. Replace faulty sensors now!
6. Air Intake Kits - It is very important to check on the air intake system to maintain the proper functioning of the engine. Buy quality air intake kits and replace old systems immediately.
7. MAF Sensor - Check and replace the Mass Air Flow sensor, if found faulty as it hampers the engine performance.

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.

Common Symptoms

• Check Engine Light will illuminate indicating error P00AD 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

• 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.

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P00AD 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.

P00AD can be a simple code to diagnose when all diagnostic steps are followed in the proper order and all tests are performed. A professional level scan tool that shows live sensor data will be required to properly diagnose any faults present.

• A suitable OBD-II scanner (or code reader) and a digital volt/ohmmeter will be most helpful in performing a successful diagnosis.
• Begin with a visual inspection of all wiring and connectors and repair or replace damaged, disconnected, shorted, or corroded wiring, connectors, and components as necessary.
• Always retest the system after repairs are completed to ensure success. If all system wiring, connectors, and components (Including fuses) appear to be in normal working order, connect the scanner (or code reader) to the diagnostic connector and record all stored codes and freeze frame data.
• Continue by clearing the code and operating the vehicle to see if it returns. This will help to determine whether or not the malfunction is intermittent.
• Test drive the vehicle afterwards to ensure that a successful repair was performed. If the IAT sensor conforms to the manufacturer’s specifications, prepare to test system circuits for resistance and continuity by disconnecting the electrical connector/s from all related control modules (especially the PCM).
• Compare your actual findings with manufacturer’s specifications and repair or replace circuits, components, or connectors as required.
• Once the repairs are made, clear the codes and test drive the vehicle to ensure that the repair was successful. If the IAT sensor and system circuits are comparable to the manufacturer’s specs, suspect a defective PCM (or another related controller).

Common Mistakes When Diagnosing OBD Code P00AD

Some of the common mistakes done while changing diagnosing the OBD code P00AD 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.