Error Code P0AE8: What It Means & What To Do?

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What does P0AE8 error code refer to? Does your inverter malfunction? Then it’s more likely that the P0AE8 error code is stored in your vehicle. Improper functioning of the high voltage control module is known as a hybrid battery temperature sensor “D” circuit. Multiple sensors are used by the hybrid battery pack to check the temperature of each battery cell. If an improper signal is found by at least one of the battery temperature sensors, then the P0AE8 error will be set. The high voltage system will be disabled if several sensors fail.

The HV control ECU will utilize a temperature sensor, which is built into the inverter, to identify the temperature of the motor inverter. The cooling system that is directed to MG1 and MG2 cools the inverter. The cooling system acts solely from the engine cooling system. The characteristics of the motor inverter temperature sensor and boost converter temperature sensor are the same. The HV control ECU will limit the load based on the signals sent by the motor inverter temperature sensor to verify the effectiveness of the inverter cooling system and to avoid the inverter from overheating. Also, the HV control ECU will find a malfunction in the wiring of the motor inverter temperature sensor and the sensor itself.

What causes this problem with the Hybrid Battery Temperature Sensor "D" Circuit?

• The improper functioning of the inverter with converter assembly.
• You might find the harness of the inverter with converter assembly to be opened or the circuit might be shorted.
• The electrical connection might be bad in the inverter with converter assembly.
• HV control ECU might not be functioning properly.

1. Engine Control Module - Erratic engine behavior shows that the ECM is damaged or defective. Fix it as soon as possible or replace it with a new ECM.
2. Powertrain Control Module - You can find the powertrain control module to be damaged if the engine light keeps flashing and if the car fails to start immediately. The right replacement for your damaged powertrain control module can be found at PartsAvatar.
3. Inverter /Converter Assembly - With the help of an inverter, the engine is attached to an alternator so that it can produce AC electricity. If you happen to find this generator inverter to be damaged, replace it quickly so that the engine functions normally and the P0AE8 error is avoided.
4. Inverter / Converter Assembly Harness - Usually the inverter harness has some wire cables and connectors along with it so that the terminals can be properly connected along with the engine throughout the vehicle. Any damage to the inverter wiring harness must be quickly replaced so as to avoid engine malfunctioning.
5. Engine Control Unit - Illumination of the check engine light is a sign of faulty engine control unit, replace it by getting a new one from PartsAvatar to avoid the P0AE8 error.

If you are facing OBD error code P0AE8, then there are significant common symptoms that can be felt or observed. We have worked out a list here to help you out in understanding this problem better.

Common Symptoms

• Lack of engine performance.
• Fuel consumption is more
• Symptoms of misfire in the vehicle.
• Either the warning light of the service engine or the engine light will remain on.

It is very important to fix the fault code P0AE8. So here are some ways with which you can correct this issue:

• Replacement of the battery and inverter with converter assembly.
• Defective engine control module/powertrain control module needs fixation.

However, if you face any issue then we have stocked a wide range of best-priced Inverter with Converter Assembly, Inverter with converter assembly harness, ECU and more to help you out in fixing your car.

If you want to easily diagnose this fault code, then all you have to do is to follow the steps which are mentioned below:

• You will find the exhaust gas temperature sensor which is utilized in diesel engines, gasoline burning engines, and also turbocharged engines.
• See if there are any short or burnt wires and replace the circuits and connectors as and when necessary.
• The 5- volt reference signal will be completed when the reluctor ring passes by the electromagnetic sensor with the protruding metal surfaces.
• As you proceed with the diagnostic procedure, the transmission leaks should be repaired and the transmission should be filled with the correct amount of fluid. If the fluid has a burnt smell, and if you are able to identify it, you must go ahead and replace the damaged transmission.
• One of the definite sign you will see is that there will be steam or smoke coming out from under the hood.
• The timing of the ignition may be set wrongly which needs proper adjustment.
• At times when you look under the hood, you might find the drive belt to appear very loose which has to be tightened or it should be completed changed with a new one.
• You will find the cylinder head gasket to be broken if you come across any fluid at the bottom of the car.
• You can confirm the cylinder head gasket to be broken when there is some form of billowing smoke coming out from the exhaust system.
• The OBD-II error code P0AE8 can also be activated by the issues that were already present down the line.
• For instance, the car may start overreacting due to a dirty MAF sensor in its fuel trim adjustments.
• The final result is that you will find the oxygen sensors to experience fuel mixture problems. 

Common Mistakes When Diagnosing the P0AE8 Code

• Broken battery control module.
• The electrical wire causes some problem.
• Failure of the high voltage battery assembly.
• High voltage control module might be broken.