P2A5BAlternative Fuel Vaporizer C Outlet Temperature Sensor Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- With three outlet sensors in one system, a plausibility check can use a majority: if A and B agree and C stands apart, vaporizer C or its sensor is the odd one out. P2A5B means the C value is electrically valid but fails such a comparison or does not follow warm-up and load as it should. The industrial vaporizer described in US6755643B2 shows the physical background: when more vapour is drawn than a unit can produce, its outlet cools. A C reading that sinks only under heavy load may therefore be true and point to a starved or fouled vaporizer (P2A8D) rather than to the sensor. A reading that stays flat whatever the engine does points to the sensor. No maker publishes the logic behind P2A5B.
- What you may notice
- Check engine light, depending on calibration
- Power loss at full load on gas
- Vaporizer C differs clearly from A and B in live data
- Likely causes
- LikelySensor C stuck, drifting or slow
- PossibleVaporizer C genuinely too cold from lack of coolant or fouling
- RareSensor without good thermal contact
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.