What does code P0117 mean and is it safe to drive?
P0117: Engine Coolant Temperature Circuit Low Input. Here’s what it means, what usually causes it, what repairs typically cost, and how urgent it is to keep driving.
PowertrainGenerally safe to drive
Repair cost
$120–$350
System
Powertrain
Urgency
medium
What this code means
The PCM sees an unrealistically low voltage from the coolant temperature sensor, often reading as extremely hot.
Common causes
- Short to ground in coolant temp sensor wiring
- Failed coolant temperature sensor
- Corroded connector
Symptoms
- Check Engine Light
- Cooling fans may run constantly
- Possible hard starting or poor performance
Typical fixes
- Replace coolant temperature sensor
- Repair wiring/connector
Repair cost range
Repairs for P0117 often fall between $120 and $350, depending on the cause and your vehicle.