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
When the skid control ECU receives an engine control system malfunction signal, this DTC is set the master caution indicator light is illuminated and the warning message is displayed on the multi-information display. (The VSC system is operating normally.)
While the engine control system is malfunctioning, as a fail safe function, TRAC and VSC controls are prohibited If a normal signal is received from the engine control system, the warning light will be turned off, the fail safe function will be cancelled and this DTC will be cleared
| DTC Code | DTC Detection Condition | Trouble Area |
|---|---|---|
| C1201/51 | Engine control system malfunction signal continues for 1 second 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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