OBD-II code · Powertrain (generic)
P017B Cylinder Head Temperature Sensor A Range/Performance
CHT sensor A reading implausible.
Is it safe to drive with P017B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor reading drifted
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cht Sensor
Related codes
- P2C39Cylinder Head Temperature Sensor B Range/Performance
- P0178Fuel Composition Sensor Circuit Low Input
- P0179Fuel Composition Sensor Circuit High Input
- P017ACylinder Head Temperature Sensor A Circuit
- P017CCylinder Head Temperature Sensor A Circuit Low
- P017DCylinder Head Temperature Sensor A Circuit High
- P017ECylinder Head Temperature Sensor A Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.