P2470
Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 3
The exhaust gas temperature sensor 3 on bank 1 (often after the DPF) shows intermittent dropouts. Erratic readings disturb DPF regeneration logic.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Intermittent connectorCommon
- Chafed wiring near hot exhaustPossible
- Harness routed against vibrating componentLess likely
Parts involved
- Exhaust Gas Temperature Sensor
- Egt Wiring
P2470 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.