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.
Monitor Description
The ECM continuously monitors its own internal circuits. This self-checking ensures that the ECM is functioning properly.
The 2 CPUs, main and sub, inside the ECM perform continuous mutual monitoring. If the outputs from the 2 CPUs differ or deviate from the standard levels, the ECM determines that the internal circuits are malfunctioning. The ECM then illuminates the MIL and set the DTCs.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0606 | ECM internal error (1 trip detection logic) | ECM |
Use the Manual With the Right Hardware
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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.
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