P01A3
Alternative Fuel Rail Pressure Sensor Circuit
Generic electrical fault on alternative fuel rail pressure sensor.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor failedCommon
Parts involved
- Alt Fuel Rail Pressure Sensor
- Sensor Wiring
P01A3 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.