Guide To P0AA0 OBD Error Code Solutions

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The trouble code P0AA0 can be defined as Hybrid Battery Positive Contactor Circuit. The high-voltage power supply circuit is connected and disconnected by the system main relays as per the requests from the HV control ECU. There is a total of 3 relays (1 for the negative side and 2 for the positive side) for ensuring a reliable operation. The SMR1 and SMR3 should be turned ON initially for the connection. Then after that the SMR2 would be turned ON and SMR1 would be turned OFF. This process would protect the circuit from the high-voltage surge current by allowing the limit current to flow via the resistor. Then SMR2 and SMR3 should be turned OFF in the same order for disconnecting. It is the HV control ECU which would inspect if the relays have turned OFF properly. The proper functioning of the SMRs (CON1, CON2 and CON3) is monitored by the HV control ECU to inspect the faults.

The hybrid battery positive contactor circuit is being monitored by the hybrid control module. This trouble code would be set by the hybrid control module when it won’t be able to control the circuit to the high voltage battery as per the specifications set by the manufacturer. The hybrid control module might disable the high voltage system.

What causes this problem with the Hybrid Battery Positive Contactor Circuit?

• Some flaws in the system main relay
• System main relay harness might be opened or sometimes shorted
• System main relay circuit might have inadequate electrical connection
• Malfunctioning HV control ECU

1. Battery Temperature Sensor - The temperature sensor is important to keep the battery from overheating. Thus, if the temperature sensor is faulty, it must be replaced immediately. Buy new temperature sensor from us at equitable prices now!
2. Hybrid Battery - Faulty hybrid battery may overheat or discharge quickly, causing drivability issues. It can affect the acceleration and throttle response and can also cause damage to various parts. Replace the faulty hybrid battery now!
3. Engine Control Module - There can be some engine performance issues due to faulty engine control module. If the ECM fails or has any problems it can lead to performance issues with the vehicle like misfires, hesitation, loss of power, and sometimes even decreased fuel economy.
4. Powertrain Control Module - PCM stands for powertrain control module. It is a car part, a control unit which is utilized on motor vehicles. It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU).
5. Inverter Cooler Pump - Inverter cooler pump is responsible for keeping the boost converter temperatures under control. Thus, if it is not functioning properly, the converter can overheat and result in underperformance of the system. Buy new cooler pump and replace in now!
6. Electronic Control Unit - If your automobile's check engine light remains on constantly, and never goes off, there's a good chance that your vehicle has a damaged electronic control unit. There are a lot of reasons why a car's check engine light will remain on. The most common reason is a defective ECU.
7. Diagnostic Tool - You will need high grade diagnostic tools for correction of the OBD error code which is detected. Visit us today to grab amazing deals.

Our main motive is to achieve customer satisfaction as for us our customers are everything and that’s why we will help you to diagnose P0AA0 code by mentioning some major symptoms below:

Common Symptoms

• The service engine soon light can start lighting up

If you wish to correct this fault code, then you have to follow certain steps. Correcting a problem needs your careful attention. Here are some ways with the help of which you will be able to correct the OBD Code P0AA0:

• It is essential to restore the flawed system main relay harness
• Repair or replace the quirky powertrain control module
• Rehabilitate the defaults in the system main relay
• Carefully adjust the faults in the system main relay circuit
• Recondition the non-functioning HV control ECU

However, if you face any issue then we have stocked a wide range of best priced ecu, battery relay, hv control ecu, battery relay harness, battery relay switch, hv battery, pcm car, ecm car and engine control module and more to help you out in fixing your car.

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

A certain sign of this is smoke or steam being discharged from under the car hood. The ignition timing could be set incorrectly and there would be a need to adjust it. Now when you are searching under the car hood, you might notice that the drive belts appear loose, then you must tighten them properly or else they can always be replaced. If you find out that there is a visible pool of fluid underneath the car, then it might indicate a failure in the cylinder head gasket. It would be confirmed in the form of billowing smoke being blown from the exhaust system. Just keep one thing in mind that the parts and components should not be restored with reference to only a P0AA0 trouble code. You can always consult the vehicle service manual for more on possible causes of the error, along with required testing.

Common Mistakes When Diagnosing The P0AA0 Code

• Nonperformance of the high voltage control module
• Failure in the car wiring