P2A6E
- Powertrain
- Manufacturer-specific
- Emissions
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Driving may cause further damage or leave you stranded. Arrange service promptly rather than waiting.
Alternative Fuel Rail Pressure Regulator Inlet Pressure Too Low
This code is in our catalogue but has not yet been through editorial review, so the guidance below is limited to what our structured data supports. We publish deeper diagnostic content only after a code has been reviewed — here is why.
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.
A trouble code records what a control module measured. It does not identify which part failed. Test before replacing anything.
- Safe to drive
- Driving may cause further damage or leave you stranded. Arrange service promptly rather than waiting.
- Urgency
- Get it looked at now
- Will it pass emissions
- No
- Check engine light
- Solid
| # | Cause | How often | Component |
|---|---|---|---|
| 1 | Alt fuel tank near empty | Very common | — |
| 2 | Alt fuel pump output low | Common | — |
Ordering reflects how often each cause is responsible in general, not a probability for your vehicle. Confirm by testing.
- Alt Fuel Rail Pressure Regulator
- Alt Fuel Pump
- AFCM
- Definition
- Generic code set (SAE J2012 / ISO 15031-6) via the OBDexopen database, dedicated to the public domain under CC0-1.0.
- Diagnostic guidance
- Written and reviewed in-house. See our editorial policy.
- Review status
- Awaiting review
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