What this code means

The PCM has not been programmed with the required vehicle-specific calibration software. This typically occurs when a replacement PCM is installed without completing the flash programming procedure.

Symptoms

• Engine will not start
• Check Engine Light on
• Multiple system malfunctions
• No communication with certain modules

Common causes

• Replacement PCM installed without programming
• PCM flash programming interrupted or failed
• PCM memory corruption
• Incorrect PCM part number installed
• Battery disconnected during programming

Diagnostic steps

1. Verify PCM part number matches vehicle application
2. Attempt to flash program PCM with dealer-level scan tool
3. Check for stable battery voltage during programming (use charger)
4. Verify VIN is programmed correctly
5. Check for software updates or TSBs

Repair notes

Flash program the PCM with the correct vehicle calibration using a dealer-level diagnostic tool.

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