What this code means

The PCM detected an issue with its direct battery power supply circuit. This circuit maintains PCM memory and learned values when the ignition is off.

Symptoms

• Check Engine Light
• Lost adaptive memory
• Poor idle after battery service
• Transmission relearn needed
• Multiple codes may set simultaneously

Common causes

• Low battery voltage
• Corroded battery cables
• Loose PCM power connection
• Blown PCM power fuse
• Damaged PCM power wiring

Diagnostic steps

1. Test battery voltage
2. Inspect battery cable connections
3. Check PCM power fuse
4. Test voltage at PCM battery circuit
5. Inspect PCM connector for corrosion

Repair notes

Check battery and cable connections. Verify PCM power fuse. Clean and secure all connections.

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