P0AD8 - OBD Trouble Code

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The trouble code P0AD8 can be explicated as Hybrid Battery Pack Air Flow Valve “A” Control Circuit High. If the engine control module would detect a variation in the voltage coming from the Hybrid Battery Pack Air Flow Valve “A” Control Circuit delivered performance that is outside the parameters set by the automobile manufacturer, then it would store the P0AD8 fault code. This would give rise to the flashing up of the check engine light.

There is a ventilation system in the hybrid battery pack so that it can maintain perfect battery operating temperature. The battery pack airflow control valve would control how much air is allowed to flow through the system. Now if the airflow valve would not operate as per the request, then the P0AD8 trouble code would be stored.

What causes this problem with the Hybrid Battery Pack Air Flow Valve “A” Control Circuit High?

• Hybrid battery pack cooling fan might be flawed
• Hybrid battery pack cooling fan harness might be opened or sometimes shorted
• Hybrid battery pack cooling fan might have inferior electrical connection

1. Hybrid Drive Cooling Pump - The cooling pump play a major role in keeping the battery temperatures under control and ensuring proper functioning. If the pump gets damaged, it can lead to increased temperatures that can hamper many starting and charging parts. Thus, replace it immediately, if found damaged.
2. Inverter Cooler Pump - The inverter cooler pump maintains a cool environment for the hybrid battery to operate properly. Without the cooler pump working properly, the battery might overheat and malfunction. Thus, if the inverter cooler pump is not working properly, inspect for damages and replace it now!
3. Hybrid Battery - A failing hybrid battery can be disastrous for the system. It triggers a whole lot of issues related to MPG, the state of charge, sudden drop in battery bars etc. So, in order to avoid them we advise you to change your hybrid battery as soon as possible. Tune into Parts Avatar.
4. Engine Control Module - ECM failures and faults can be very difficult to find and resolve as these are very rare and might require a complete reprogramming of the system to avoid wrong codes from getting stored in the system, leading to misdiagnosis. Replace it now!
5. Powertrain Control Module - Faulty PCM can disrupt the normal functioning of the vehicle by affecting the transmission system and the fuel delivery system. This will cause the system to store wrong OBD error and thus can lead to misdiagnosis.
6. Diagnostic Tools - Take the help of a professional mechanic to diagnose OBD code error. Use high grade diagnostic tools to resolve this issue. Buy new tools and equipment form us! 

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0AD8 here:

Common Symptoms

• Check engine light might come into signal
• Issues in operating high voltage system

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• The flawed HV battery assembly should be restored properly
• Rehabilitate the defaults in the Hybrid battery pack cooling fan harness
• Carefully adjust the faults in the Hybrid battery pack cooling fan circuit
• The battery smart unit should be restored to working order

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Here are some steps which you should follow in order to diagnose this fault code:

• This is a general type of error code which is diagnosed with the help of a scanner.
• The mechanic will insert a scanner to diagnostic port of the vehicle and recover the codes and freeze frame data.
• If he happens to find any additional error codes, he has to address them as well.
• Once it is done, he has to reset the vehicle, and then test drive to see if the error code appears.
• If the error code does not return, then there can be an erratic condition.
• But, if the error code returns, then the mechanic has to check the hybrid battery voltage isolation sensor circuit.
• If the Hybrid Battery Pack Air Flow Valve “A” Control Circuit is defective, then it has to be replaced.
• Also, the mechanic can check for any sign of defects in the related parts, then he should quickly fix the issue.
• Then the mechanic has to check the wires, connectors and other electrical components and quickly replace them if he finds them to be damaged or defective.
• If the issues are not yet sorted out, then the mechanic will use a digital voltmeter/ ohmmeter and connect it to the vehicle.
• Once the circuit is inspected, he will thoroughly check all the harness and repair them accordingly.
• In most cases, this error code can arise mostly because of any shorted wires or faults in the Hybrid Battery Pack Air Flow Valve “A” Control Circuit.
• Whenever the mechanic or a trained professional, repairs any of the component like wires or connectors, he will reset the code and test drive the vehicle again to see if the error code appears again.
• This can actually help the mechanic to know if the problem is fixed.

Common Mistakes When Diagnosing The P0AD8 Code

• There can be some issues in the battery control module
• Failure in the high voltage battery pack airflow control valve
• Blocked battery airflow passageway
• Wiring related issues