P0606: Control Module Processor Fault
The engine computer found an internal fault in itself.
Green, yellow, red: three ways P0606 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Set once after a battery change.
Schedule a repair
Returns or drivability changes. Diagnose; a software update sometimes fixes it.
Stop and get help
Stalling or no-start. Don't drive.
Symptoms you might notice
- Various
- Possible stalling or limp mode
Common causes, cheapest first
- Internal engine computer failure
- Poor power or ground to the computer
- Software issue (check for updates)
What you can check before calling
- Check battery cables and grounds
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
Related codes
More network & modules codes
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0606 mean?
P0606 means "Control Module Processor Fault". The engine computer found an internal fault in itself.
Can I drive with code P0606?
It depends on what the vehicle is doing. Green: Set once after a battery change. Yellow: Returns or drivability changes. Diagnose; a software update sometimes fixes it. Red: Stalling or no-start. Don't drive.
What causes P0606?
The most common causes are: internal engine computer failure; poor power or ground to the computer; software issue (check for updates).
Is P0606 a serious code?
It can be. Stalling or no-start. Don't drive.
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