Powertrain
Definition only
Lights the check engine lamp
P2A1B: Injection Pump Fuel Metering Control E Range/Performance (Cam/Rotor/Injector)
Standardized SAE J2012 code · P2Axx codes
What does P2A1B mean?
Fuel metering on channel E of the injection pump is outside the calibrated tolerance. Mechanical wear or pressure regulator drift.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Internal wear in pump element
- Medium Pressure regulator drift
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2A1B on the same make and model first.
P2A1B in the community
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Describe your P2A1B problemRelated codes
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