OBD-II code · Powertrain (generic, extended)
P2C28 Fuel Injector Group B Supply Sense Circuit High
Voltage on the supply sense circuit of fuel injector group B is above the expected window. Indicates overvoltage or wire shorted to B+.
Is it safe to drive with P2C28?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyAlternator regulator drift - overvoltage
- PossibleSense wire shorted to B+
- 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
- P2C25Exhaust Heat Exchanger Exhaust Bypass Valve A Position Sensor Circuit High
- P2C26Fuel Injector Group B Supply Sense Circuit
- P2C27Fuel Injector Group B Supply Sense Circuit Low
- P2C29Turbocharger/Supercharger Bypass Valve B Stuck
- P2C2ATurbocharger/Supercharger Bypass Valve B Position Sensor Circuit/Open
- P2C2BTurbocharger/Supercharger Bypass Valve B Position Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.