OBD2 Codes

P0118 – ECT Sensor Circuit High Input

ECT sensor reading too high

Details

The ECT sensor is reading abnormally high.

Typical causesFaulty ECT sensor, wiring short
SymptomsCheck engine light, possible overheating
SeverityMedium
DIY checksCheck ECT sensor wiring, test sensor
ToolsOBD2 scanner

Utilities

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Quick checklist

Check ECT sensor wiring, test sensor

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FAQ

Common questions

What causes P0118?

Faulty ECT sensor, wiring short

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