P0AE2 OBD Error Code: Problem & Solutions

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Are there any symptoms for P0AE2 error code? How the error code gets stored in the vehicle? Don’t worry. Here’s the solution. Malfunctioning of the high voltage control module is generally known as the hybrid battery recharge contactor circuit stuck closed. To properly control the operation of the high voltage system, internal transistors are utilized by the high voltage control module. The P0B12 error will be set in the vehicle if the control module identifies one or more of the relays to be faulty.

The high voltage power supply circuit is attached and detached by the system main relays corresponding to the request from the HV control ECU. To make sure that the operation is proper, 3 relays are present, 1 for negative and other 2 for positive. To fix SMR1 and SMR3, turn it ON initially. Accordingly, SMR2 will turn on and SMR1 will be off. This step will protect the circuit from the high-voltage surge current by permitting the reduced current to move through the resistor. To disable, turn off SMR2 and SMR3 in this order. The HV control ECU will look after the relay if it is turned off properly. The HV control ECU looks for the write operation of the SMRs (CON1, CON2, and CON3) to verify the malfunction.

What causes this problem with the Hybrid Battery Precharge Contactor Circuit Stuck Closed?

• Damaged system main relay.
• There might be an opening or the system main relay harness might have a short circuit.
• The electrical connection of the system main relay circuit might be weak.
• HV control ECU might be damaged

1. Engine Control Module - The engine performance will be poor and there will be a drop in fuel economy if the ECU malfunctions. Replace it immediately.
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 by getting a new one from PartsAvatar as soon as possible. ​
3. Battery Relay - The performance of your vehicle will be normal only when the damaged battery relay is replaced with a new one.
4. Battery Relay Harness - The damaged battery relay harness has to be replaced to avoid the P0AE2 error code.
5. Engine Control Unit - Erratic engine behavior is a symptom of a broken engine control unit. Replacing it as soon as possible can help you to avoid the P0AE2 error code

After knowing all the cause behind the issues, let’s have a look at a few common symptoms of this problem. Read through this section to learn more about this error code.

Common Symptoms

• Possible indications of misfiring.
• Fuel consumption is high.
• The warning light of the service engine or the engine light might be flashing.
• Performance by the engine seems to be weak

Fixing problems with your car is not as easy as it might seem. You need to be extremely careful and follow certain steps.

• The battery has to be changed.
• Replacing the faulty engine control module.
• Repairing the damaged powertrain control module.

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

• The spaces between the splines are used by the electromagnetic output speed sensor, when the output shaft is turned, to give voltage signal interruptions in the circuit.
• The wires and connectors must be tested at the fuel shut off valve to ensure that the voltage and ground readings are nearby the battery voltage.
• Focus particularly on the wires and connectors which are contaminated due to engine oil or leaky transmission fluids, burnt hot exhaust pipes or faulty parts due to road debris. Discrepancies between the input and output speed sensor readings are interpreted by the PCM as a result of defective transmission friction element application.
• The sensor has an electromagnetic design and utilizes a reluctor ring on the inner shaft as reference points.
• At times, the mechanic will hear an unusual noise coming from the radiator fan that turns and as well as the fan blade that turns.
• You will also find several other belts that are compelled by these devices under the hood.
• Every belt is driven by an engine pulley which is actually located on the engine of an automobile.
• The serpentine belt is usually a continuous belt which every car has and is used for driving several peripheral devices.
• Every part or components of a vehicle should not be changed or altered which is only specific to the P0AE2 diagnostic trouble code.
• P0AE2 error can also appear due to the faults which might have already appeared.
• For instance, a faulty MAF sensor can make the car to overcompensate because of its fuel-trim adjustments.
• As a result, you might find the fuel mixture issues due to oxygen sensors.

Common Mistakes When Diagnosing the P0AE2 Code

• Auxiliary 12V battery might be defective.
• Problem with the electrical wires.
• High voltage system relay seems to be broken.
• The defective high voltage control module