OBD-II code · Powertrain (generic, extended)
P2C27 Fuel Injector Group B Supply Sense Circuit Low
Voltage on the supply sense circuit of fuel injector group B is below the expected window. Indicates collapsed supply or short to ground.
Is it safe to drive with P2C27?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply rail collapsed under load
- PossibleSense wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Injector Group B, Wiring Harness, Ecm
Related codes
- P2C24Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Circuit Low
- P2C25Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Circuit High
- P2C26Fuel Injector Group B Supply Sense Circuit
- P2C28Fuel Injector Group B Supply Sense Circuit High
- P2C29Turbocharger/Supercharger Bypass Valve B Stuck
- P2C2ATurbocharger/Supercharger Bypass Valve B Position Sensor Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.