OBD-II code · Powertrain (generic, extended)
P2CFB Belt Integrated Starter Generator Belt Tensioner Control Circuit High
The control circuit of the belt-integrated starter/generator (BISG) belt tensioner reports a control circuit high condition. Belt tension cannot be modulated for assist/regen modes.
Is it safe to drive with P2CFB?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyControl wire shorted to B+
- PossibleOpen tensioner actuator
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Bisg Belt Tensioner, Wiring Harness, Hybrid Control Module
Related codes
- P2CF8Engine Coolant Bypass Valve D Control Circuit Driver Current/Temperature Too High
- P2CF9Belt Integrated Starter Generator Belt Tensioner Control Circuit/Open
- P2CFABelt Integrated Starter Generator Belt Tensioner Control Circuit Low
- P2CFCA/C Clutch Control Circuit
- P2CFDA/C Clutch Control Circuit Low
- P2CFEA/C Clutch Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.