P0AE0 - OBD Trouble Code

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How does the P0AE0 error code gets stored in the vehicle? How can this error code be removed? The improper functioning of the high voltage control module is generally known as the hybrid battery negative contactor control circuit high. In order to control the proper operation of the high voltage system, relays are used by the high voltage control module. The battery pack with high voltage has a current sensor which is actually placed on the negative battery cable. If the control module is found to be faulty by one or more relays, then the P0AE0 error will be set.

The system main relay will connect and disconnect the high voltage power supply in response to the request from the HV control ECU. To make sure the operation is reliable, there are 3 relays, 2 for positive and 1 for negative. Initially turn on SMR1 and SMR3 to connect them. Then, SMR2 will be turned on and SMR1 will be off. This will safeguard the circuit from high voltage surge current by permitting less current to pass through the resistor. To disable turn off SMR2 first and then SMR3. The turning off of the relays is properly checked by the HV control ECU. The correct operation of the SMRs (CON1, CON2, and CON3) is checked by the HV control ECU to verify any malfunctions.

What causes this problem with the Hybrid Battery Negative Contactor Control Circuit High?

• Broken system main relay.
• The harness of the system main relay might be shorted or it might have an opening.
• The electrical connection of the system main relay might be bad.
• Defective HV control ECU

1. Engine Control Module - You can easily find out that the engine control module in your vehicle is damaged if your vehicle faces issues like stalling or misfiring. Additionally, the behavior of the engine can be erratic. In one such scenario, it is always best to replace the faulty engine control module.
2. Powertrain Control Module - The engine will fail to start or the fuel economy will be poor if the powertrain control module is faulty. Get them replaced as soon as possible so that you can get rid of the P0AE0 error code.
3. Battery Relay - Facing troubles with your faulty battery relay? Then it’s high time to get a new one from PartsAvatar.
4. Battery Relay Harness - Are you looking for a replacement for your faulty battery relay harness? Shop them from PartsAvatar at best prices online to avoid P0AE0 error.
5. Engine Control Unit - The performance of the engine will be very poor if the engine control module is defective. Replace it quickly by getting a new one from PartsAvatar

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P0AE0 code by mentioning some major symptoms below:

Common Symptoms

• Probable causes of a misfire.
• Fuel consumption might be high.
• You might notice the flashing of the engine light and the warning light of the service engine.
• Performance might be low by the engine.

Have a look at some ways with which you can correct the P0AE0 code:

• Faulty battery/battery relay harness has to be fixed.
• Defective powertrain control module and engine control module needs fixation.

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

• Retest the system after a successful diagnosis. If every component is in proper working condition, then attach a scanner to the diagnostic connector and recover the stored codes and freeze frame data.
• This step can be highly useful to determine if there are any erratic conditions which made the code to get stored.
• The burnt fluid smell is a sign that the transmission functions at the low-level condition and there are chances for internal mechanical failure.
• The low pump pressure can arise due to the hydraulic passages that are blocked, the pump that is defective, shift solenoids that are faulty or may be an electronic pressure regulator which can be damaged.
• One of the definite signs 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 P0AE0 can be confirmed by the presence of smoke which comes from the exhaust.
• With specific to this error code, you must not change the parts or components.
• It is always best to check with the vehicle service manual for more information.

Common Mistakes When Diagnosing the P0AE0 Code

• Malfunctioning of the auxiliary 12V battery.
• Broken wires can cause some issue.
• Faulty high voltage system relay.
• High voltage control module might be malfunctioning