P2A5AAlternative Fuel Vaporizer C Outlet Temperature Sensor Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Vaporizer C is the third unit in a gas system that splits the conversion of liquid fuel over several heat exchangers, a layout that only makes sense for engines with very high gas demand. Each unit needs its own outlet sensor because a vaporizer that cannot keep up shows it first by a falling outlet temperature; patent US6755643B2 even uses an outlet sensor to shut a vaporizer down once the draw exceeds its capacity. P2A5A is the undirected circuit fault on the sensor of vaporizer C. No manufacturer documents this code, and public sources on three-vaporizer layouts are thin. CARB still requires circuit monitoring for such inputs. Depending on calibration, the module may limit gas operation or ignore unit C. Start with the connector and the sensor resistance.
- What you may notice
- Check engine light, depending on calibration
- Gas operation limited, less power at high load
- Vehicle falls back to the other fuel
- Likely causes
- LikelyConnector or wiring of the vaporizer C sensor faulty
- PossibleVaporizer C outlet sensor broken
- RareControl module input for sensor C faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.