P0092Powertrain
Powertrain · SAE
Fuel Metering Valve 1 — High Input
Meaning
The engine control module has detected that the control signal or voltage in the fuel metering valve (IMV/FMV) circuit of fuel system 1 is consistently above the maximum allowed threshold. The circuit is shorted to power, or the valve has an internal fault generating an abnormally high voltage.
Common causes
- Metering valve signal or supply wire shorted to positive (battery or reference voltage)
- Faulty metering valve with internal resistance shorted to power
- Connector swapped or contacting high-voltage circuits
- Defective ECM output driver producing high output voltage
- Defective internal pull-up resistor in the ECM holding the signal high
- Moisture contamination in the connector creating a path to positive
Symptoms
- Check-engine light (MIL) illuminated
- Excessive or uncontrollable rail pressure
- Activation of the pressure limiter valve (PLV)
- Power reduction or limp-home mode
- Risk of injector and rail damage from overpressure
Severity
Very high: a short to power on the metering valve causes maximum fuel flow to the HP pump; rail pressure may reach dangerous levels.
What to do
- Measure voltage in the metering valve circuit with ignition ON and engine stopped
- Check for short to power on the signal and control wires
- Inspect wiring for accidental contact with high-voltage circuits
- Check the connector for oxidation, internal shorts, or moisture
- Replace the metering valve if wiring is serviceable and the fault is internal