P2081
Exhaust Gas Temperature Sensor Circuit Intermittent (Bank 1 Sensor 1)
The EGT sensor at bank 1 sensor 1 signal jumps or drops out intermittently — typically a connector or chafed wire near the exhaust manifold heat zone.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Connector loose or oxidisedCommon
- Wire chafed against exhaust shieldingPossible
- Connector with intermittent contact under vibrationLess likely
Parts involved
- Exhaust Gas Temperature Sensor
- Egt Harness
P2081 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.