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.
Fail-Safe Mode
2012 Nissan-Datsun Sentra SE-RSECTION Fail-Safe Mode
When the malfunction is detected, the ECM enters fail-safe mode and the MIL illuminates.
| Detected items | Engine operating condition in fail-safe mode | |
|---|---|---|
| Engine coolant temperature sensor circuit | Engine coolant temperature will be determined by ECM based on the following condition CONSULT displays the engine coolant temperature decided by ECM. | |
| Condition | Engine coolant temperature decided (CONSULT display) | |
| Just as ignition switch is turned ON or START | 40°C (104°F) | |
| Approx. 4 minutes or more after engine starting | 80°C (176°F) | |
| Except as shown above | 40 - 80°C (104 - 176°F) (Depends on the time) | |
| When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates while engine is running. | ||
RENDER: 1.0x
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.