The P06AA: PCM/ECM/TCM Internal Temperature ‘B’ Too High refers to a situation where the internal temperature of the Powertrain Control Module (PCM), Engine Control Module (ECM), or Transmission Control Module (TCM) exceeds the acceptable limit. This may be caused by an overheating issue, a faulty internal temperature sensor, or a malfunction within the control module’s cooling system.
P06AA – Quick Overview
| Code | Information |
|---|---|
| Meaning | P06AA: PCM/ECM/TCM Internal Temperature ‘B’ Too High |
| Is it serious? | Yes, as overheating can damage the control module and affect vehicle performance. |
| Possible causes | – Internal temperature ‘B’ of PCM/ECM/TCM is too high – Faulty internal temperature sensor – Overheating of control module |
| How to diagnose? | – Check internal temperature of PCM/ECM/TCM – Inspect cooling system for issues – Replace temperature sensor or control module if necessary |
P06AA Meaning
The P06AA code indicates that the internal temperature of the PCM, ECM, or TCM is too high, which may lead to system failure or reduced functionality. This problem could be caused by a faulty internal temperature sensor, cooling system failure, or general overheating of the control module. If left unresolved, it could result in serious damage to the vehicle’s control system.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that may indicate related overheating issues. | OBD-II Scanner |
| Check Internal Temperature | Use a diagnostic tool to monitor the internal temperature of the PCM/ECM/TCM and compare it to normal operating values. | Diagnostic Tool |
| Inspect Cooling System | Check the cooling system around the control module for blockages, malfunctioning fans, or other cooling issues. | Flashlight, Inspection Tools |
| Test the Internal Temperature Sensor | Test the temperature sensor within the PCM/ECM/TCM to verify if it is working correctly. If faulty, replace the sensor. | Multimeter, Temperature Sensor Tool |
| Replace Control Module if Necessary | If the overheating persists and the sensor is functional, consider replacing the control module to resolve the issue. | Control Module, Tools for Replacement |
| Clear Code and Retest | After repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to ensure the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to confirm the P06AA code has not returned. | OBD-II Scanner |
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I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko