P0606 — PCM Processor Fault
Category: Powertrain Severity: High
Updated:
DTC code P0606 means: PCM Processor Fault. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include faulty ECM/PCM, software/calibration error and poor ground connection; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty ECM/PCM
- Software/calibration error
- Poor ground connection
- Low battery voltage
Symptoms
- Engine won't start or misfires
- Erratic behavior
How to diagnose it step by step
- Check battery, alternator and grounds.
- Clear and see if it returns.
- Update the software.
- Repair or replace the ECU.
How to fix it
Check the battery and grounds; it may require reprogramming or replacing the ECU.
Estimated repair cost
$100–1,500.
Frequently asked questions
What does DTC code P0606 mean?
PCM Processor Fault.
Is code P0606 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0606?
Not recommended.
Related codes
P0605 P0604 P0603 P0602 P0601 P0600 P0615 P0620 P0627 P0641
Refine by car make
- Audi P0606: ECM or power supply.
- BMW P0606: ECM or battery voltage.
- Ford P0606: PCM or faulty ground.
- Opel P0606: ECM.
- Peugeot P0606: ECM or power supply.
- Renault P0606: ECM or power supply.
- Toyota P0606: ECM.
- Volkswagen P0606: ECM or power supply issue.
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