OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P017C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Cht Sensor, Sensor Wiring
Related codes
- P0179Fuel Composition Sensor Circuit High Input
- P017ACylinder Head Temperature Sensor A Circuit
- P017BCylinder Head Temperature Sensor A Range/Performance
- P017DCylinder Head Temperature Sensor A Circuit High
- P017ECylinder Head Temperature Sensor A Circuit Intermittent/Erratic
- P017FEVAP System Leak Detection Pump Module Air Filter Restricted
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.