What does code P0606 mean?

Q: What does code P0606 mean?

PCM Processor Fault. P0606 is a generic powertrain code indicating that the Powertrain Control Module (PCM) has detected an internal processor fault, meaning the computer's central processing unit or its supporting circuitry has failed a self-test. The PCM monitors its own processor, memory, and internal communication buses, and when the processor fails to execute instructions correctly or reports an internal error, it sets this code and typically illuminates the check engine light.

DTC codes / P06xx · Computer and output circuits / P0606

P0606PCM Processor Fault

P0606 is a generic powertrain code indicating that the Powertrain Control Module (PCM) has detected an internal processor fault, meaning the computer's central processing unit or its supporting circuitry has failed a self-test. The PCM monitors its own processor, memory, and internal communication buses, and when the processor fails to execute instructions correctly or reports an internal error, it sets this code and typically illuminates the check engine light.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaComputer and output circuits

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.