PRE-RELEASE
Too high or low fuel pressure
Symptom: Too high or low fuel pressure
| Too high or low fuel pressure |
Fault symptom
Too high or low fuel pressure
Criteria
Diagnostic trouble codes: P0090 or P0091Procedure
| 1. |
Check the pressure from the feed pump. The pressure should be 3.8 - 5 bar.
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| 2. |
Check that the back pressure in the return line is not too high. The pressure may be a maximum of 1 bar.
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