P0601high severityPowertrain
Internal Control Module Memory Check Sum Error
on 2024 Volvo EX30 Single Motor RWD · RWD
What this code means
The PCM has detected a memory checksum error during self-test.
Symptoms
- Check Engine Light
- Erratic engine behavior
- Possible no-start
- Multiple system faults
Common causes
- PCM internal failure
- PCM programming corruption
- Voltage spike damage
- Water intrusion into PCM
Diagnostic steps
- Attempt PCM reprogramming/reflash
- Check for water damage to PCM
- Test PCM power and ground circuits
- Check for TSBs regarding PCM update
Repair notes
Reprogram PCM first. If error persists, replace PCM.
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