Code result
P0117
Engine Coolant Temperature Circuit Low Input
Moderate severity
What it means
The ECT signal voltage is below threshold, which the ECU interprets as an implausibly hot coolant temperature (typical NTC sensor characteristic — low resistance at high temperature).
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Signal wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Sensor failed shorted internally
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0117 freeNo credit card required