P0606 — Control module processor fault
| Meaning | The ECU has detected an error in its own internal operation. Before condemning it, note that in a good share of cases the problem is the supply it receives, not the unit. |
| Family | Powertrain (P) |
Typical symptoms
Many codes at once with no logic
Multiple warning lights
Behaviour that changes between starts
Common causes
Moisture inside the unit
Badly done jump start or welding on the vehicle
Interrupted software update
Genuinely faulty control unit
What to do
Frequently asked questions
What does code P0606 mean?
Control module processor fault. The ECU has detected an error in its own internal operation. Before condemning it, note that in a good share of cases the problem is the supply it receives, not the unit.
Can I keep driving with code P0606 active?
With caution: limp mode possible, have it checked soon
Common causes — P0606
Unstable supply voltage: battery at end of life or loose earths Moisture inside the unit Badly done jump start or welding on the vehicle Interrupted software update Genuinely faulty control unit
How do you fix code P0606?
Always start with battery, terminals and engine earths, and measure voltage during cranking: a drop below 10 volts is enough to set this code. Only then, with a healthy supply, does repairing or reprogramming the unit make sense.
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- P0600 — Serial Communication Link Malfunction
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- P0602 — Control Module Programming Error
- P0603 — Internal Control Module Keep Alive Memory (KAM) Error
- P0604 — Internal Control Module RAM Error
- P0605 — Internal Control Module Read Only Memory (ROM) Error
- P0607 — Control Module Performance
- P0608 — Control Module VSS Output "A" Malfunction
- P0609 — Control Module VSS Output "B" Malfunction
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