P2A12Injection Pump Fuel Metering Control C (Cam/Rotor/Injector)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The injection pump fuel metering codes cover electrically controlled actuators that decide how much fuel a diesel pump delivers – on distributor pumps the quantity solenoid, on common rail usually the inlet metering unit on the high-pressure pump, which a Bosch patent describes together with its flushing line. Actuators A and B have their own code groups (P0251 ff., P0256 ff.); C continues the series for pumps or engines with a third metering actuator, with its plausibility, low and high faults in P2A13–P2A15. P2A12 is the general fault of actuator C without a finer breakdown. No manufacturer documents P2A12 publicly; Saab's 2011 9-5 diesel, for example, reports an open circuit of its single pressure regulator as P0251. Depending on the system, rail pressure, power or speed are limited.
- What you may notice
- Check engine light on
- Reduced power or limp mode
- Hard starting or stalling
- Likely causes
- LikelyOpen circuit or poor contact in the actuator C wiring or connector
- PossibleMetering actuator C coil failed or valve sticking
- RareDirt or water in the fuel jamming the metering valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.