P2A52Alternative Fuel Vaporizer A Outlet Temperature Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Temperature sensors of this type are usually thermistors whose resistance falls as they get warmer, the same principle Ford describes for the fuel rail sensor of its 2003 bi-fuel CNG trucks. A signal under the lower limit would therefore mean an impossibly hot vaporizer A; in practice the signal line touches ground or the sensor is shorted inside. AC STAG lists this case as a reducer temperature sensor short. The danger is that a hot reading could let gas flow into a unit that is actually cold, so a control module will normally replace the value or fall back to petrol. No manufacturer documents P2A52. Pull the plug and watch the live data: a swing to very cold clears the harness, a hot value that remains points to a short in the wiring.
- What you may notice
- Check engine light, depending on calibration
- Gas mode blocked, vehicle runs on petrol
- Live data shows an implausibly hot vaporizer
- Likely causes
- LikelySignal wire shorted to ground
- PossibleSensor shorted internally
- RareMoisture or coolant in the connector
- 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: €80 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.