P0606
PCM Processor Fault
1992-1998 BMW 325i E36 2.5L I6 M50 🇩🇪
Critical SeverityPowertrain
Description
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.
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
P0606 on Other Vehicles
Common Questions
What does code P0606 mean on a 1992-1998 BMW 325i E36?
P0606 stands for "PCM Processor Fault". The PCM has detected an internal processor error.
What are the symptoms of P0606 on a BMW 325i E36?
Common symptoms of P0606 include: Check Engine Light, Erratic operation, Possible no-start, Multiple fault codes.
What causes P0606 on a 1992-1998 BMW 325i E36?
Common causes of P0606 include: PCM internal failure, Power supply issue to PCM, Severe voltage spike, PCM overheating.