6 documented codes across 19 real diagnostics.
Exhaust back-pressure and gas temperature sensing, separate from the DPF logic it feeds.
Ranked by how often we actually see them
- P0471, Exhaust pressure sensor range/performance
- P242B, not individually documented
- P0472, Exhaust pressure sensor A circuit low
- P0545, Exhaust gas temperature sensor circuit low, bank 1 sensor 1
- P242E, not individually documented
- P0470, Exhaust pressure sensor