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Home >> Nissan-Datsun >> 2003 >> Frontier Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0117: Engine Coolant Temperature Sensor Circuit Low Input Or DTC P0118: Engine Coolant Temperature Sensor Circuit High Input >> Fail Safe Mode
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Fail Safe Mode

When this malfunction is detected, ECM enters fail safe mode. MIL illuminates and ECM determines that ECT is fixed at 104°F (40°C) when ignition is first turned on, then increases based on engine run time. After 4 minutes, ECM determines that ECT is fixed at 176°F (80°C). Cooling fan operates while engine is running.

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