P2428
Exhaust Gas Temperature Too High Bank 1
An EGT sensor on bank 1 reports a temperature above the safety threshold for prolonged operation - typical for blocked DPF, restricted exhaust, or excessive fuelling. Risk of catalyst, DPF or turbo damage.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- DPF blocked or active regenerationCommon
Parts involved
- Exhaust Gas Temperature Sensor B1
- DPF B1
P2428 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.