P0253 — Injection Pump Fuel Metering Control "A" Range/Performance (Cam/Rotor/Injector)
Drivable short-term, but fix now to avoid damage.
What P0253 means
This code means the engine computer found the 'A' fuel metering control of the diesel injection pump operating outside its expected range or performance limits. It often points to a worn or sticking metering valve, wiring issues, low fuel pressure, or wear inside the pump. Repairs typically start with checking wiring and fuel supply, then the metering valve, and the pump if needed.
Common symptoms
- Check engine light is on
- Uneven or surging engine power
- Rough idle or hesitation
- Reduced fuel economy
- Hard starting under some conditions
Common causes
- Worn or sticking fuel metering valve
- Low or fluctuating fuel pressure
- Wiring or connector resistance problems
- Internal wear in the injection pump
- Contaminated or poor-quality fuel
Typical repair cost
$200 – $1800
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0253 code?
Short trips may be possible, but performance can be unpredictable with surging or stalling. It's best to limit driving and get it diagnosed soon to avoid further wear.
How much does it cost to fix a P0253 code?
Repairs range from around $200 for wiring, fuel supply, or metering valve work up to $1,800 or more if the injection pump needs replacing.
Is a P0253 code serious?
Yes, it's worth taking seriously. Out-of-range fuel metering affects how the engine performs and can worsen over time, leading to stalling or no-start issues.
What does 'range/performance' mean for this code?
It means the metering control is working, but its readings or output fall outside the expected window. This often signals wear, weak fuel pressure, or a sticking valve rather than a total failure.