P2A48
Alternative Fuel Tank C Pressure Sensor Circuit Low
Voltage on the pressure sensor signal line of alternative fuel tank C is below the expected window. Wire shorted to ground or sensor short.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Signal wire shorted to groundCommon
- Internal sensor shortPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Alt Fuel Tank C Pressure Sensor
- Wiring Harness
- Afcm
P2A48 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.