OBD-II code · Powertrain (generic, extended)
P229A Fuel Pressure Regulator B Exceeded Control Limits - Pressure Too Low
Fuel Pressure Regulator B Exceeded Control Limits - Pressure Too Low: the control module has detected this fault condition. This controls fuel-rail pressure.
Is it safe to drive with P229A?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyRegulator leaks or pump weak
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
- 1.5–6 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pressure Regulator
Related codes
- P228CFuel Pressure Regulator A Exceeded Control Limits - Pressure Too Low
- P2C9EFuel Pressure Regulator C Exceeded Control Limits - Pressure Too Low
- P2CA0Fuel Pressure Regulator D Exceeded Control Limits - Pressure Too Low
- P2297O2 Sensor Out of Range During Deceleration (Bank 1 Sensor 1)
- P2298O2 Sensor Out of Range During Deceleration (Bank 2 Sensor 1)
- P2299Brake Pedal Position / Accelerator Pedal Position Correlation
- P229BFuel Pressure Regulator B Exceeded Control Limits - Pressure Too High
- P229CFuel Pressure Regulator B Exceeded Learning Limits - Too Low
- P229DFuel Pressure Regulator B Exceeded Learning Limits - Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.