P0252–P0257 Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)
The sensor still works, but its reading has drifted outside the window the ECU expects. That usually means a tired sensor or a problem with what it is measuring, not a broken wire.
Can you drive it? The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.
Which code is which
Same fault, different cylinder or bank — diagnosed the same way. Several set together usually means one shared cause.
| Code | Definition | Severity |
|---|---|---|
P0252 | Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector) | Investigate soon |
P0257 | Injection Pump Fuel Metering Control B Range/Performance (Cam/Rotor/Injector) | Investigate soon |
The definition
P0252: Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector).
P0252 is a powertrain code (the engine or gearbox), defined by the SAE standard - it means the same thing on any make of car, and any generic OBD-II reader will decode it.
What to check first
Cheapest and fastest checks first:
- Check the oil level and when it was last changed. These adjusters run on oil pressure and are the first thing to suffer from old or low oil.
- Check the cam adjuster solenoid and its screen for sludge.
- Only then suspect the timing chain or belt and its tensioner.
Reading the code is the easy part
A code names the circuit that complained. What tells you why is watching the sensor behind it while the engine runs — and that is where a code reader stops and a diagnostic tool starts.
VAGPULSE reads every module in a VW, Audi, Skoda or SEAT — not just the engine — shows the live measuring blocks behind this fault, gives you the freeze-frame conditions it was logged under, and clears it once you have fixed it. It also does what a generic OBD reader cannot on a VAG: service resets, coding, adaptations, and Stage 1–3 flashing with your original file saved first.
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Common questions
What does P0252 mean?
P0252 means Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector). The sensor still works, but its reading has drifted outside the window the ECU expects. That usually means a tired sensor or a problem with what it is measuring, not a broken wire.
Can I drive with P0252?
The engine light will stay on and the car may run in a reduced-power mode. Read the freeze-frame data to see the conditions the fault was logged under.