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P0605 — Internal Control Module ROM Error

PCM ROM (Read Only Memory) has failed a self-test. Programming may be corrupted.

Severity: HighRepair: $100-$1,500Difficulty: Advanced

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Common symptoms of P0605

Common causes of P0605

Repair cost & difficulty

Typical cost to fix P0605: $100-$1,500 · Difficulty: Advanced

Pro tip: Try a PCM reflash first ($100-200) before replacing the PCM ($500-1,500).

Vehicles commonly affected

All makes

Related trouble codes

P0600P0601P0604P0606

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.