OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2539?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen or shorted wiring to the sensor
- PossibleFailed sensor element
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Lp Fuel Pressure Sensor, Sensor Wiring
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.