Injector Metering Control - Pressure Signal
The engine control unit detects an abnormal pressure signal in the fuel injector metering system.
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What it means (plain English)
The computer is seeing that the fuel pressure isn't where it should be for proper injector operation, which can mean the fuel is either too low or too high.
What the computer is actually seeing
The engine control unit monitors the fuel pressure sensor's voltage signal, typically between 0.5 to 4.5 volts, and expects it to reflect the engine load and RPM correctly. If it sees a pressure drop below 2.5 psi or an unexpected high pressure over 70 psi, it sets this fault.
What a healthy reading looks like
Fuel pressure should be within 50 to 60 psi at idle and not fluctuate too much under different load conditions; the sensor return voltage should reflect this pressure accurately.
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.
- 1Start with a visual inspection of wiring and connectors to the fuel pressure sensor. Look for damage or corrosion; repair if needed.
- 2Check fuel levels in the tank to ensure it’s not too low; fill if necessary and test.
- 3Using a fuel pressure gauge, connect it to the fuel rail. Verify that the actual fuel pressure is within expected values (50-60 psi at idle).
- 4If pressure is normal, inspect the fuel pressure sensor output voltage using a multimeter. Ensure the voltage is between 0.5 to 4.5 volts while the engine runs under different conditions.
- 5If sensor voltage is out of range, consider replacing the fuel pressure sensor. If it's in the right range but pressure is still off, test the fuel pump performance.
Common causes
- Faulty fuel pressure sensor
- Blocked fuel lines or filter
- Fuel pump issues
- Wiring or connector issues in the sensor circuit
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s moderate severity, so you can drive temporarily, but fix it soon to avoid potential engine damage.
Will this code come back after resetting?
If the underlying issue isn't resolved, yes, it likely will come back after some driving.
Why does it seem related to fuel pump issues?
Because the code deals with fuel pressure, any irregularity can indicate problems with the pump's ability to maintain proper fuel pressure.
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