Injection Pump Fuel Metering Control Malfunction
The control module detects a malfunction in the fuel injection pump metering system.
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What it means (plain English)
The engine control module (ECM) is trying to manage how much fuel the injection pump sends to the engine but sees a problem with the signals it's getting.
What the computer is actually seeing
The ECM monitors the voltage and frequency signals from the fuel injection pump. A value outside the expected range for voltage (around 0.5V to 4.5V) indicates a malfunction.
What a healthy reading looks like
Expected fuel supply pressure is typically between 40-60 psi (275-414 kPa) at the fuel rail, depending on the engine model.
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.
- 11. Verify that the fuel tank has adequate fuel. Check the fuel level sensor for proper function.
- 22. Inspect the wiring and connectors for the fuel injection pump. Look for damage or corrosion.
- 33. Measure the voltage at the pump connector with the key on (engine off). Expected voltage is between 0.5V and 4.5V. If not, repair the wiring.
- 44. Check fuel pressure at the rail with a gauge. Expected pressure is 40-60 psi. If it’s low, further diagnosis of the pump/regulator is needed.
- 55. If everything checks out, scan for additional codes that could indicate a related issue (like ECM communication).
Common causes
- Faulty fuel injection pump
- Wiring issue to the fuel injection pump
- Failed fuel pressure regulator
- Bad ECM
- Clogged fuel filter
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended as it can cause poor engine performance and increased emissions.
Will this code come back after clearing it?
Yes, if the underlying issue isn't resolved, the code will likely return.
Why might it pair with other fuel-related codes?
Fuel injection issues often stem from the same system faults affecting pressure or signal integrity.
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