Applicable Systems
OBD-II
Symptoms
The powertrain control module has an internal fault. Engine and transmission control may be affected.
Possible Causes
- PCM internal memory checksum error
- PCM processor or circuit failure
- PCM programming corrupted or outdated
Troubleshooting Steps
- Step 1: Check for additional DTCs that may indicate related faults
Related DTCs noted - Step 2: Verify PCM software version and reflash if needed
Software updated successfully - Step 3: Replace PCM if internal fault persists after reflash
New PCM resolves fault
How to Reset
To reset: Clear the DTC after resolving the PCM internal fault or replacement.
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Source: SAE J2012 OBD-II Diagnostic Trouble Codes, SAE International
Category: OBD-II
Published: 2026-10-17
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