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+.
Voltage on the supply sense circuit of fuel injector group B is above the expected window. Indicates overvoltage or wire shorted to B+.
Common causes
- high
Alternator regulator drift - overvoltage
One of the most commonly reported causes for this code — check this first.
Typical part cost: $130-770
- medium
Sense wire shorted to B+
A plausible cause — test and verify before replacing parts.
Typical part cost: $130-770
See all causes + fix costs
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P2C28 mean?
P2C28 means "Fuel Injector Group B Supply Sense Circuit High". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2C28?
alternator regulator drift - overvoltage; sense wire shorted to b+; connector pins corroded - high contact resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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