P2080
Exhaust Gas Temperature Sensor Range/Performance (Bank 1 Sensor 1)
The pre-catalyst EGT sensor on bank 1 returns a value that does not match the expected temperature curve under load. Often slow response time after long service life or a contaminated tip.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sensor aged — slow responseCommon
- Sensor tip soot-fouledPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Egt Sensor
P2080 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.