Guide To P06AA OBD Error Code Solutions

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Every vehicle has a catalytic convertor. In the front and back of this catalytic convertor there are oxygen sensors present. At the point when the vehicle is warm, and is running in closed loop mode, the reading of the oxygen sensor waveform fluctuates. When the internal temperature is too warm the OBD error code P06AA will be set.

The TCM shuts down when it gets overheated to avoid further damage due to the heat. It is able to do so, because the control solenoid valve assembly has a temperature sensor built in. This detects any increase in temperature of the Transmission Control Module (TCM). This inbuilt TCM temperature sensor is what provides information to the TCM to accordingly shut down, and it remains that way till the over temperature condition goes away.

What causes this problem with the PCM/ECM/TCM Internal Temperature "B" Too High?

• Corrosion or damage of the connector
• Control module ground strap show defects or have become loose
• Fault or damage of the wiring
• Defectiveness found of the PCM, ECM, or TCM

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It is essential to know the symptoms of an issue as only then you would be able to solve the problem. These symptoms sometimes may cause confusion, but definitely are helpful in streamlining the issue as per your car. So that’s why we have listed out some major symptoms of OBD Code P06AA here:

Common Symptoms

• Engine doesn’t start
• Engine stalls after starting
• Shifting is improper and difficult
• Transmission warning sign lamp is lit
• Check engine light is illuminated

Here are some ways with the help of which you will be able to correct the OBD Code P06AA:

• Clean any corrosion found in the connectors
• Repair or replace all the faulty wiring
• Repair or replace the faulty ground straps with food quality ones
• Flash or completely replace the PCM, ECM or TCM as per requirement

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Here are some steps which you should follow in order to diagnose this P06AA fault code:

Get your Technical Service Bulletins (TSBs) for the specific vehicle you are driving, be very careful about that. Match it with the correct model, year of manufacture and issue. Research the process for troubleshooting mentioning by your manufacturer. This helps a lot in resolving the problems as per your vehicle.

Now using the same reference, locate all the control modules for a thorough visual inspection. You are looking for any defects in the wiring, such as scraping, rubbing, bare or shorted wires, or any burn spots too. The damages observed will have to be rectified, for this, either repair or replace the parts. It is important to consider how long the repaired parts would function after repairing them. It would be best to replace those, that may not survive too long. In your visual inspection also include the ground straps and the ground wires. Then move on to connectors, check for security, corrosion or any damaged pins that may be present. Before proceeding, ensure they are either repaired or replaced as per need.

The PCM, ECM, and the TCM are also part of this inspection. To check if they are functioning as needed, you can simply refer the TSB as it will have all the technical specifications for your vehicle’s PCM module.

Common Mistakes When Diagnosing the P06AA Code

• Failure of the Internal transmission to work
• Powertrain Control Module (PCM) seems to have failed
• Low levels of transmission fluid noticed
• Wiring shows multiple issues