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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
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
Common causes
Ordered by how often each turns out to be the cause.
- Regulator leaks or pump weakCommon
Parts involved
- Fuel Pressure Regulator
P229A is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.