P2A6E
Alternative Fuel Rail Pressure Regulator Inlet Pressure Too Low
The measured inlet pressure of the alternative fuel rail pressure regulator falls below the calibrated minimum. Tank near empty, pump output insufficient, or upstream restriction.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Alt fuel tank near emptyCommon
- Alt fuel pump output lowPossible
Parts involved
- Alt Fuel Rail Pressure Regulator
- Alt Fuel Pump
- Afcm
P2A6E 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.