P01CA
Fuel Rail Pressure Too Low - Engine Cranking Bank 2
Rail pressure on bank 2 fails to reach the start threshold during cranking. Hard or no-start.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- HP pump wornCommon
Parts involved
- High Pressure Fuel Pump
- Lift Pump
- Fuel Filter
P01CA 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.