OBD-II code · Powertrain (generic, extended)
P2C3C Cylinder Head Temperature Sensor B Circuit Intermittent/Erratic
The ECM detects a circuit intermittent/erratic fault on the cylinder head temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P2C3C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor connector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Cylinder Head Temperature Sensor B, Wiring Harness, Ecm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.