P0251 Injection pump fuel metering control "A" malfunction

Did the light just come on? Did you change the fuel filter or run out of fuel by any chance? Any drivability problems?

Cly

The electrical side of it has circuits that run from the power-train control module to the optical fuel temperature sensor. If there is air the the fuel system the light will come on. Make sure fuel system is free of air. I would suspect that the optical sensor is faulty. I do not believe that it is service separately from the fuel injection pump.

Here is a schematic of the circuits:

Here is a picture of the pump assembly. Optical fuel temp sensor is #1.

Hope this helps.

Cly

I think that it comes with the unit, but I would still make some calls and see if maybe they are available separately.

Cly