Too high or low fuel pressure
Symptom: Too high or low fuel pressure
|
|
Too high or low fuel pressure
|
Fault symptoms
Too high or low fuel pressure
Conditions
Diagnostic trouble codes: P0090 or P0091
Diagnostic procedure
|
1.
|
Check the pressure from the feed pump. The pressure should be 3.8 - 5 bar.
|
|
2.
|
Check that the back pressure in the return line is not too high. The pressure may be a maximum of 1 bar.
|
Note
|
|
From and including Vehicle Identification Number 63516890 the pump has a larger ejector diameter which results in a lower back pressure.
|
|
