Code result
P2539
Low Pressure Fuel System Sensor Circuit
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Open or shorted wiring to the sensor
highOne of the most commonly reported causes for this code — check this first.
Failed sensor element
mediumA plausible cause — test and verify before replacing parts.
Related help
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