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P0251 - Injection Pump Fuel Metering Control A Malfunction (Cam/rotor/injection)


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#16 Auto1

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Posted 09 October 2013 - 07:13 PM

This fault is either the IMV,one or more injectors,or the fuel pump,or a COMBINATION of these.If you do not want high repair bills , don't buy a common rail engine.

 

The fault can be double barrelled also.ie One fault hidden behind another.You might find one really bad injector with excessive leak off,replace it,and still find the code returning, as the pressure requirements seen by the ECU still have not been met.

 

You then need to change the pump.The pressure loss in this case is due to the injector and pump.

 

The pressure is carefully controlled,but the ECU can only control it, if the components within the system are within tolerance.



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#17 stooge75

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Posted 10 October 2013 - 08:18 PM

leak-off test isnt going to say 100% there's a problem,but might. 




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