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Code

P0117

Cooling

Engine coolant temperature sensor circuit low input

The coolant temperature signal reads too low (very hot).

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Most likely causes

Shorted ECT sensor
Wiring short
Faulty sensor

Symptoms you may notice

Check engine light
Engine may run rich
Fan runs constantly

Checks to run

Measure sensor resistance
Check wiring for shorts

Tools you may need

Multimeter

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Cooling

Coolant thermostat below regulating temperature

Engine coolant temperature sensor circuit malfunction

Insufficient coolant temperature for closed-loop fuel control

Cooling fan relay 1 control circuit malfunction

Engine coolant temperature sensor circuit high input

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