P2034
Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 2)
A general electrical fault is reported on the exhaust gas temperature (EGT) sensor at bank 2 sensor 2 — open, short, or out of plausibility. EGT sensors monitor catalyst, DPF, and turbocharger inlet/outlet temperatures.
- 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 element failedCommon
- Open wire in EGT harnessPossible
- Connector corroded by exhaust heatLess likely
Parts involved
- Exhaust Gas Temperature Sensor
- Egt Harness
P2034 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.