OBD-II code · Powertrain (generic, extended)
P2C38 Cylinder Head Temperature Sensor B Circuit
The ECM detects a circuit fault on the cylinder head temperature sensor b circuit. Reading cannot be used reliably for control.
Is it safe to drive with P2C38?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor failed
- PossibleWiring or connector fault
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
Related codes
- P2C35Crankcase Pressure Sensor B Circuit High
- P2C36Crankcase Pressure Sensor B Circuit Intermittent/Erratic
- P2C37Cold Start Engine Coolant Pump Performance
- P2C39Cylinder Head Temperature Sensor B Range/Performance
- P2C3ACylinder Head Temperature Sensor B Circuit Low
- P2C3BCylinder Head Temperature Sensor B Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.