P2A7C
Alternative Fuel Hydraulic Pressure Sensor Circuit Low
Voltage on the alternative fuel hydraulic system pressure sensor signal line 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 Hyd Pressure Sensor
- Wiring Harness
- Afcm
P2A7C 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.