OBD-II code · Powertrain (generic, extended)
P2A45 Alternative Fuel Tank B Pressure Sensor Circuit Intermittent/Erratic
The pressure sensor signal of alternative fuel tank B drops out or jumps intermittently. Loose connector or noisy ground.
Is it safe to drive with P2A45?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor connector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Alt Fuel Tank B Pressure Sensor, Wiring Harness, Afcm
Related codes
- P01A2Alternative Fuel Tank A Pressure Sensor Circuit Intermittent/Erratic
- P2A4AAlternative Fuel Tank C Pressure Sensor Circuit Intermittent/Erratic
- P2A42Alternative Fuel Tank B Pressure Sensor Range/Performance
- P2A43Alternative Fuel Tank B Pressure Sensor Circuit Low
- P2A44Alternative Fuel Tank B Pressure Sensor Circuit High
- P2A46Alternative Fuel Tank C Pressure Sensor Circuit
- P2A47Alternative Fuel Tank C Pressure Sensor Range/Performance
- P2A48Alternative Fuel Tank C Pressure Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.