P0255
PPowertrainInjection Pump Fuel Metering Control A Intermittent
What does this code mean?
Severity : HighP0255 signals intermittent operation of fuel metering control A on the diesel injection pump (cam, rotor or injector depending on design). The engine control module detects a signal that drops out or varies abnormally from time to time. Implementation varies by manufacturer.
Symptoms
- Check engine light on.
- Intermittent power loss or hesitation.
- Occasional stalling.
- Sometimes hard starting.
Possible causes
- Loose or corroded connector.
- Wiring damaged by chafing or heat.
- Faulty metering actuator.
- Poor ground or unstable supply voltage.
- Worn injection pump.
Diagnosis and repair
- Inspect the connector and wiring while wiggling wires with the engine running.
- Check grounds and supply voltage.
- Measure actuator resistance with a multimeter.
- Watch desired and actual fuel quantity in live data.
- Repair or replace the faulty part, clear the code and road test.
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Code
P0255
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012