Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P0606: ECM Processor Malfunction
- Turn the ignition switch to ON (II).
- Clear the DTC with the HDS.
- Turn the ignition switch to LOCK (0).
- Turn the ignition switch to ON (II).
- Wait 40 seconds.
- Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0606 indicated?
YES -Go to step 7.
NO -Intermittent failure, the system is OK at this time.
- Update the ECM if it does not have the latest software (see ECM UPDATE ), or substitute a known-good ECM (see SUBSTITUTING THE ECM ).
- Turn the ignition switch to LOCK (0).
- Turn the ignition switch to ON (II).
- Wait 40 seconds.
- Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0606 indicated?
YES -If the ECM was updated, substitute a known-good ECM (see SUBSTITUTING THE ECM ), then go to step 8. If the ECM was substituted, go to step 1.
NO -If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see ECM REPLACEMENT ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.