Powertrain
Definition only
Lights the check engine lamp
P2C28: Fuel Injector Group B Supply Sense Circuit High
Standardized SAE J2012 code · P2Cxx codes
What does P2C28 mean?
Voltage on the supply sense circuit of fuel injector group B is above the expected window. Indicates overvoltage or wire shorted to B+.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Common causes
- High Alternator regulator drift - overvoltage
- Medium Sense wire shorted to B+
- Low Connector pins corroded - high contact resistance
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2C28 on the same make and model first.
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