OBD-II code · Powertrain (generic, extended)
P20DD Exhaust Aftertreatment Fuel Pressure Sensor Circuit
A general electrical fault is reported on the aftertreatment fuel-pressure sensor — used to verify the dedicated HC-dosing rail is primed.
Is it safe to drive with P20DD?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySensor failed
- PossibleHarness fault
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.7–3 h
- Emissions test
- Likely to fail
- Parts involved
- Aftertreatment Fuel Pressure Sensor
Related codes
- P20DAExhaust Aftertreatment Fuel Supply Control Circuit High
- P20DBExhaust Aftertreatment Fuel Supply Control Stuck Open
- P20DCExhaust Aftertreatment Fuel Supply Control Stuck Closed
- P20DEExhaust Aftertreatment Fuel Pressure Sensor Circuit Range/Performance
- P20DFExhaust Aftertreatment Fuel Pressure Sensor Circuit Low
- P20E0Reductant Pressure Too Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.