P20E0Exhaust Aftertreatment Fuel Pressure Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The doser feed pressure sensor reports a signal above its upper electrical limit. On a typical three-wire sensor this happens when the signal line is open and pulled up, shorted to the 5 V reference or to battery voltage, or when the ground is lost. Volvo and Mack store it as P20E000 and in guide KC-2157 direct technicians to the sensor's wiring and connector. In 2025 both brands also ran service campaigns on 2024–2025 trucks (at Mack with MP7/MP8 engines) built with an AHI fuel pressure sensor outside specification, which could set codes and upset aftertreatment control. Low signal is P20DF, plausibility P20DE and unsteady signal P20E1.
- What you may notice
- Check engine light on
- Active regeneration blocked
- Likely causes
- LikelySignal wire open or shorted to reference or battery voltage
- PossibleLost sensor ground
- PossibleSensor from a faulty production batch
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.