OBD-II code · Powertrain (generic, extended)
P2C9D Fuel Pressure Regulator C Exceeded Control Limits - Pressure Too High
Fuel pressure regulator C cannot maintain commanded pressure - actual rail pressure rises above the calibrated upper limit.
Is it safe to drive with P2C9D?
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 C, Fuel Rail
Related codes
- P228DFuel Pressure Regulator A Exceeded Control Limits - Pressure Too High
- P229BFuel Pressure Regulator B Exceeded Control Limits - Pressure Too High
- P2C9FFuel Pressure Regulator D Exceeded Control Limits - Pressure Too High
- P2C9AThrottle Actuator B Control Exceeded Learning Limit
- P2C9BCold Start Turbocharger/Supercharger Wastegate Actuator A Range/Performance
- 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.