What does code P0117 mean?
The ECU detects very low voltage from the coolant temperature sensor, interpreting extremely high engine temperature
OBD-II Code
P0117 — Engine Coolant Temperature Circuit Low Input
The ECU detects very low voltage from the coolant temperature sensor, interpreting extremely high engine temperature
Common symptoms
- Cooling fan running almost constantly
- possible engine protection mode
- high temperature warning light
Possible causes
- Signal circuit shorted to ground
- faulty ECT sensor
Initial recommendation
Stop driving if real overheating is suspected, inspect ECT wiring and replace sensor if necessary.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0117 with your vehicle's actual symptoms for more complete diagnostic guidance.
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