OBD-II code · Powertrain (generic, extended)
P2C9F Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too High
Fuel pressure regulator D cannot maintain commanded pressure - actual rail pressure rises above the calibrated upper limit.
Is it safe to drive with P2C9F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyRegulator stuck closed
- PossibleFuel return path blocked
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Pressure Regulator D, Fuel Rail
Related codes
- P228DFuel Pressure Regulator A Exceeded Control Limits - Pressure Too High
- P229BFuel Pressure Regulator B Exceeded Control Limits - Pressure Too High
- P2C9DFuel Pressure Regulator C Exceeded Control Limits - Pressure Too High
- P2C9CCold Start Turbocharger/Supercharger Wastegate Actuator B Range/Performance
- P2C9EFuel Pressure Regulator C Exceeded Control Limits - Pressure Too Low
- P2CA0Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too Low
- P2CA1Charge Air Cooler Coolant Pump Sense Circuit High
- P2CA2Charge Air Cooler Coolant Pump Sense Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.