P2027EVAP Fuel Vapor Temperature Sensor Circuit High Voltage
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2027 is the high-voltage counterpart of P2026: the signal sits near the reference, which an NTC sensor would only produce at a temperature far below anything plausible. In practice the sensor circuit is open – a broken wire, an unplugged connector, a corroded pin – or the signal line is shorted to a voltage source. Ford's 2014 code list names P2027 among MIL-relevant faults, but no manufacturer publicly describes its threshold or timing. On Audi vehicles the sensor sits inside leak detection unit J909 at the canister, so an open there affects the whole unit. CARB treats sensors used by the EVAP monitor as input components that must be checked for out-of-range values. Until the circuit is fixed, the leak test cannot run and EVAP readiness stays open.
- What you may notice
- Check engine lamp on
- Vapor temperature shown far below ambient
- Likely causes
- LikelyOpen circuit – broken wire or unplugged connector
- PossibleSignal wire shorted to reference or battery voltage
- PossibleTemperature sensor open internally
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.