P2A9A
Alternative Fuel Tank Select Valve C Control Circuit Performance
The control circuit of alternative fuel tank select valve C reports a control performance condition. Tank selection on multi-tank CNG/LPG systems cannot be commanded reliably.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Valve stuck in last commanded positionCommon
- Coil force degradedPossible
Parts involved
- Alt Fuel Tank Select Valve C
- Wiring Harness
- Afcm
P2A9A 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.