Powertrain, generic (extended)

P2080 Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 1)

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

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.

Likely causes

Sensor element drifted or slow after many heat cycles

Sensor loose, bent or not reaching into the exhaust stream

ECM calibration flags a good sensor (software update released, e.g. Nissan)

Exhaust leak upstream of the sensor cools the reading

Symptoms

Engine warning lamp on
Particulate filter regeneration blocked or aborted on diesels
Often no noticeable change in driving

Repair estimate

DifficultyMediumDIY possible

Parts and labour€0–350

Time0.3–1.5 h

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

Parts involved

exhaust gas temperature sensor

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov.