P20DF

Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Problems with diesel particulate filter regeneration
Increased fuel consumption
Unstable engine idling

Causes

Fuel pressure sensor malfunction
Open or short circuit in wiring harness
Poor connection or corroded contacts
Problems with the engine control unit
Faulty relay or fuse

How to Fix

Check the integrity of the sensor wiring harness
Check the connections and contacts of the sensor
Test the fuel pressure sensor
Check sensor circuit relays and fuses
If necessary, replace the fuel pressure sensor

Related codes

P20E0 P20E1 P20E2