Powertrain
generic / SAE
P2539
Low Pressure Fuel System Sensor Circuit
General electrical fault on the low-pressure fuel system sensor — typically the lift-pump or pre-supply pressure sensor that monitors the rail feeding the high-pressure pump. With no valid reading, the ECM cannot verify that lift pressure is sufficient for HP-pump intake.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number5 / 39
Possible causes
- Open or shorted wiring to the sensor high
- Failed sensor element medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–500 €
- Estimated time: 0.5–2 h
- Component: lp fuel pressure sensor
- Component: sensor wiring
- MIL / check engine light
Sources
References
sae:J2012