Code result
P2C28
Fuel Injector Group B Supply Sense Circuit High
High severity
What it means
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?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Alternator regulator drift - overvoltage
highOne of the most commonly reported causes for this code — check this first.
Sense wire shorted to B+
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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