P017C
Cylinder Head Temperature Sensor A Circuit Low
CHT sensor A signal voltage below expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
CHT sensor A signal voltage below expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Common causes
- high
Signal wire shorted to ground
One of the most commonly reported causes for this code — check this first.
Typical part cost: $70-390
- low
Connector pins corroded - high contact resistance
Less common, but worth ruling out after the more likely causes.
Typical part cost: $70-390
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P017C.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P017C.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P017C.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P017C mean?
P017C means "Cylinder Head Temperature Sensor A Circuit Low". It is a generic OBD-II code that points to a fault in the fuel & air metering.
What are the most common causes of P017C?
signal wire shorted to ground; connector pins corroded - high contact resistance; harness chafing through insulation — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P017C diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.