P0545
Exhaust Gas Temperature Sensor Bank 1 Sensor 1 Low
The exhaust gas temperature sensor signal at bank 1, sensor 1 is below the lower diagnostic threshold. Indicates short to ground or sensor fault.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- EGT sensor internally faultyCommon
- Signal wire shorted to groundPossible
Parts involved
- Exhaust Gas Temp Sensor
- Sensor Wiring
P0545 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.