Engine Error
P0601
Internal Control Module Memory Check Sum Error
Severity
High
Symptoms
ABS light on, traction control off, engine may not start, harsh shifting
Common Causes
- Internal PCM/ECM memory failure
- Short circuit in vehicle wiring killing PCM
- Water damage to engine computer
- Voltage spike from bad alternator
How to Fix
- 1 Replace and program new PCM
- 2 Check alternator voltage output
- 3 Inspect PCM connectors for water intrusion
- 4 Reflash PCM software if possible
Estimated Repair Cost
USD
$300
–
$1500
PCM Replacement and programming: $500 - $1,500