ElectricalSeverity High: diagnose before driving on

P0606Control Module Processor

What it means

The ECU detected an internal processor fault (often the monitoring processor disagreeing with the main one).

Symptoms

Check engine light
Possibly no start, stalling or limp mode
Other codes may be stored at the same time

Common causes

Low voltage or poor ground at the ECU
Water ingress or corrosion in the ECU or its connector
Software problem (update may exist)
Internal ECU fault

What to check first

Check ECU power and ground supplies under load
Check the ECU and connectors for water or corrosion
Look for a software update or technical bulletin before replacing the ECU

Can I drive with P0606? Not recommended. P0606 can lead to stalling, limp mode or engine damage; diagnose it before driving further.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

Cases with P0606 (0)

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P0606: questions and answers

What does P0606 mean?

P0606: Control Module Processor. The ECU detected an internal processor fault (often the monitoring processor disagreeing with the main one).

What are the symptoms of P0606?

Check engine light. Possibly no start, stalling or limp mode. Other codes may be stored at the same time.

What causes P0606?

Low voltage or poor ground at the ECU. Water ingress or corrosion in the ECU or its connector. Software problem (update may exist). Internal ECU fault.

How do you diagnose P0606?

1. Check ECU power and ground supplies under load 2. Check the ECU and connectors for water or corrosion 3. Look for a software update or technical bulletin before replacing the ECU

Can I drive with P0606?

Not recommended. P0606 can lead to stalling, limp mode or engine damage; diagnose it before driving further.