P0606
PCM Processor Fault
2000-2000 BMW 323i E46 2.5L I6 M52TU
Critical SeverityPowertrainGeneric (SAE)
The 2000 BMW 323i E46 is equipped with a 2.5L inline-6 engine. Below you'll find detailed p0606 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
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 2000-2000 BMW 323i E46?
P0606 stands for "PCM Processor Fault". The PCM has detected an internal processor error.
What are the symptoms of P0606 on a BMW 323i E46?
Common symptoms of P0606 include: Check Engine Light, Erratic operation, Possible no-start, Multiple fault codes.
What causes P0606 on a 2000-2000 BMW 323i E46?
Common causes of P0606 include: PCM internal failure, Power supply issue to PCM, Severe voltage spike, PCM overheating.
Last updated: March 2026