Powertrain, generic (extended)

P2025 EVAP Fuel Vapor Temperature Sensor Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2025 means the vapor temperature reading is electrically valid but does not make sense against other inputs or over time. Audi documents a real-world cause on 2016–2018 A6 and A7 with the 3.0 litre engine: water gets into the tank ventilation path, runs past the leak detection pressure switch (NVLD) into the canister and turns to ice in cold weather. Owners notice the pump nozzle clicking off while refuelling, and P2025 can appear with P0441, P0451 and P0453. The bulletin has the canister weighed – above 2650 g it is replaced with switch and vent tube – and the filter relocated or the wheel liner updated. Volkswagen released ECM software for the 2022 Taos (24HV) and for Jetta and Taos (24iR) that also prevents P2025 entries. Ford's 2014 code list marks it as a MIL code.

Likely causes

Water or ice in canister and NVLD switch (Audi A6/A7 3.0)
ECM software setting the code falsely (VW Jetta/Taos 2022)
Temperature sensor drifted or slow to respond

Symptoms

  • Check engine lamp on
  • Fuel nozzle shuts off repeatedly when filling the tank
  • EVAP readiness incomplete

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–700
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

evap fuel vapor temp sensorevap canisterevap leak detection module

Related codes

P2024P2026P2027P0441P0451P0453

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, performanceparts.ford.com.