P2080Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2080 means the first exhaust temperature sensor on bank 1 passes its wiring checks, yet its reading does not fit the engine state. Each maker tests this differently. On the 6.6 L Duramax (GM 15OBDG09) the heat the exhaust flow should bring to the sensor is integrated and compared with what the sensor saw; the 3.0 L LZO (25OBDG04B) expects a minimum rise after more than 10,800 s of soak, which exposes a frozen value or a sensor no longer inside the pipe. Both are Type B. Ford's 6.7 L diesel cross-checks four sensors after 6 h off with a 50 °C key-on limit. VW's 2014 Touareg TDI allows 250 K above or 200 K below its model. Nissan cured false P2080 on the VK56VD and VR30DDTT petrol engines with new ECM software. Erratic jumps belong to P2081.
- What you may notice
- Engine warning lamp on
- Particulate filter regeneration blocked or aborted on diesels
- Often no noticeable change in driving
- Likely causes
- LikelySensor element drifted or slow after many heat cycles
- PossibleSensor loose, bent or not reaching into the exhaust stream
- PossibleECM calibration flags a good sensor (software update released, e.g. Nissan)
- RareExhaust leak upstream of the sensor cools the reading
- 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: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.