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.
2009 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE
DTC C1201/51 Engine Control System Malfunction: Description
The skid control ECU is connected to the ECM via CAN communication. When the signals from the engine are input normally, the fail-safe is canceled and the DTC is not stored.
DTC DETECTION CONDITION CHART
| DTC Code | Information Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1201/51 | - | SFI system malfunction signal continues for 1 second. | ECM |
Factory Service Tools
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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.