Error Code P0AC6: What It Means & What To Do?

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The trouble code P0AC6 can be explicated as Hybrid Battery Temperature Sensor “B” Range/Performance. If the engine control module would detect a variation in the voltage coming from the hybrid battery voltage isolation sensor circuit delivered performance that is outside the parameters set by the automobile manufacturer, then it would store the P0AC6 fault code. This would give rise to the flashing up of the check engine light.

Do you want to gain some more knowledge about the P0AC6 trouble code? This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. There is a high voltage isolation monitor feature equipped in the automobiles. The main role of the high voltage isolation circuit is to examine the resistance between the high voltage positive and negative direct current (DC) bus and chassis ground. This test is only run by the battery energy control module when the ignition transitions from ON to OFF and the high voltage contactor relays have opened. There is an internal isolation sensor in the battery energy control module which would measure the resistance between the high voltage DC positive and negative bus and chassis ground. The battery energy control module would run an internal self-check of this sensor circuit. An AC signal would be sent by the battery energy control module over the DC bus and its amplitude would be monitored. A low amplitude or collapsed return signal would indicate a loss of resistance to chassis ground and a loss of isolation will be indicated by the hybrid powertrain control module 2. Because this diagnostic runs after system power down, the diagnostic status would not get reported until the next key cycle.

What causes this problem with the Hybrid Battery Temperature Sensor “B” Range/Performance?

• HV battery assembly might be flawed
• HV battery assembly harness might be opened or sometimes shorted
• HV battery assembly might have inferior electrical connection
• Quirks in the battery smart unit

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 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 P0AC6 here:

Common Symptoms

• Check engine light might come into signal

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:

• It is essential to restore the flawed HV battery assembly
• Rehabilitate the defaults in the HV battery assembly harness
• Carefully adjust the faults in the HV battery assembly 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 temperature sensor “B” 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 temperature sensor “B” 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 P0AC6 Code

• There can be some issues in the battery control module
• Failure in the high voltage battery assembly
• Defaults in the high voltage control module