P0252Injection Pump Fuel Metering Control A Range/Performance (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
- These codes cover the electrically controlled fuel metering actuator on a diesel injection pump. On older distributor pumps it was a solenoid that set the injected quantity; on common rail it is usually an inlet metering valve on the high-pressure pump that lets only as much fuel into the pumping elements as the rail needs, instead of spilling the excess through a pressure valve. Manufacturers use different codes for this part: Ford P0001–P0004, GM Duramax P0090–P0092. P0252 is the range or performance fault of actuator A, and the meaning depends on the maker. Saab's 2011 9-5 diesel sets it when the driver stage of the pump pressure regulator overheats – a sign of a shorted turn or excessive current – with the warning light at once; Ford checks the same under P0002 at a driver temperature above 170 °C. Generally the code can also mean the actuator does not achieve the expected effect.
- What you may notice
- Check engine light on
- Loss of power, limp mode
- Fluctuating rail pressure, hunting idle
- Likely causes
- LikelyMetering actuator with shorted turns, too low resistance (driver overheats)
- PossibleActuator mechanically sticking or dirty (fuel quality, wear debris)
- PossibleWiring with contact resistance
- RareDriver stage in the engine module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · 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.