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 C1201/51 Engine Control System Malfunction: Description
If trouble occurs in the engine control system, the ECM transmits the abnormality to the skid control ECU. The skid control ECU sets this DTC and the skid control ECU prohibits TRAC and VSC control.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|---|---|
| C1201/51 | At an engine speed of 500 rpm or more, a trouble signal in the engine control system continues for 5 sees, or more. | Engine control system |
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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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