Powertrain
generic / SAE
P28F7
Exhaust Pressure Too High Bank 1
The exhaust pressure measured on bank 1 exceeds the calibrated maximum. Common causes are clogged DPF, restricted exhaust path, or stuck exhaust brake/back-pressure valve.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number8 / F7
Possible causes
- DPF clogged with soot or ash high
- Back-pressure valve stuck closed medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–8 h
- Component: exhaust pressure sensor b1
- Component: particulate filter
- Component: exhaust system
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012