P0606critical severityPowertrain
PCM Processor Fault
on 2023 BMW i7 M70 Dual Motor AWD · AWD
What this code means
The PCM has detected an internal processor error.
Symptoms
- Check Engine Light
- Erratic operation
- Possible no-start
- Multiple fault codes
Common causes
- PCM internal failure
- Power supply issue to PCM
- Severe voltage spike
- PCM overheating
Diagnostic steps
- Check PCM power and ground circuits
- Look for water or heat damage
- Check for voltage spikes
- Try PCM reprogramming
Repair notes
Usually requires PCM replacement. Check power and grounds first.
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