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Home >> Toyota >> 2003 >> MR2 C65M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0116: Engine Coolant Temperature Sensor Circuit Range/Performance Or DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Circuit Description & Possible Causes
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Circuit Description & Possible Causes

Engine Coolant Temperature (ECT) sensor is a thermistor which monitors engine coolant temperature. DTC is set when ECT sensor signal value is out of range during engine operation. Possible causes are:

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