P0601
Internal Control Module Memory Check Sum Error
2001-2003 BMW 525i E39 2.5L I6 🇨🇦
High SeverityPowertrain
Description
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.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0601 on Other Vehicles
Common Questions
What does code P0601 mean on a 2001-2003 BMW 525i E39?
P0601 stands for "Internal Control Module Memory Check Sum Error". The PCM has detected a memory checksum error during self-test.
What are the symptoms of P0601 on a BMW 525i E39?
Common symptoms of P0601 include: Check Engine Light, Erratic engine behavior, Possible no-start, Multiple system faults.
What causes P0601 on a 2001-2003 BMW 525i E39?
Common causes of P0601 include: PCM internal failure, PCM programming corruption, Voltage spike damage, Water intrusion into PCM.