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.
Malfunction Threshold
A malfunction is detected if the following conditions are present after the engine has stopped and the ignition switch has been turned to LOCK (0), for at least 6 hours before restarting the engine:
| Temperature difference between each sensor values | Malfunction judgment | |||||
|---|---|---|---|---|---|---|
| ECT1 - ECT2 | IAT - ECT2 | ECT sensor 1 | IAT sensor | ECT sensor 2 | ||
| Higher than 57 °F (32 °C) | Higher than 57 °F (32 °C) | Normal | Normal | Failure | ||
| From -43 °F (-24 °C) to 57 °F (32 °C) | Failure | Normal | Normal | |||
| Lower than -43 °F (-24 °C) | Failure | Failure | Normal | |||
| From -43 °F (-24 °C) to 57 °F (32 °C) | Higher than 57 °F (32 °C) | Normal | Failure | Normal | ||
| From -43 °F (-24 °C) to 57 °F (32 °C) | Normal | Normal | Normal | |||
| From -44 °F (-25 °C) to -108 °F (-60 °C) | Normal | Failure | Normal | |||
| Suspended(1) | ||||||
| Lower than -108 °F (-60 °C) | Normal | Failure | Normal | |||
| Lower than -43 °F (-24 °C) | Higher than 57 °F (32 °C) | Failure | Failure | Normal | ||
| From -43 °F (-24 °C) to 57 °F (32 °C) | Failure | Normal | Normal | |||
| Lower than -43 °F (-24 °C) | Normal | Normal | Failure | |||
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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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