Injection Pump Fuel Metering Control A Range/Performance Problem
Fuel metering control for the injection pump isn't functioning correctly.
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What it means (plain English)
When the engine needs fuel, a sensor or actuator in the injection pump isn’t giving the right signal. This can cause poor performance or stalling.
What the computer is actually seeing
The engine control module (ECM) sees that the fuel metering control isn't reaching expected operation levels, usually under certain RPMs and loads.
What a healthy reading looks like
Expected voltage range for the fuel metering control sensor is typically between 0.5 to 4.5 volts; varying based on the fuel demand and engine load.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the fuel level in the tank; ensure it's at least 1/4 full.
- 2Inspect wiring and connectors for the fuel metering control sensor; look for frayed wires or corrosion.
- 3Test the voltage at the fuel metering control sensor connector; should be within 0.5 to 4.5 volts.
- 4If outside expected range, replace the sensor and retest.
- 5If voltage is normal, check the fuel pressure readings; should be between 45 to 65 psi under operation load.
- 6Verify that fuel injectors are working properly; faulty injectors can lead to incorrect metering.
Common causes
- Faulty fuel metering control sensor
- Wiring issues or poor connections to the sensor
- Defective fuel pump or injectors
- Air leaks in the fuel system
- Incorrect fuel pressure
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's not recommended to drive, as you may experience stalling or performance issues.
Will this code come back after clearing?
If the underlying issue isn't resolved, the code will likely return.
Why does this code pair with P0251 or P0252?
These codes relate to similar issues in the fuel injection control system, indicating a shared problem area.
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