Powertrain
generic / SAE
P28FA
Exhaust Pressure Too Low Bank 2
The exhaust pressure measured on bank 2 falls below the calibrated minimum. Common causes are leaks upstream of the sensor, missing DPF substrate, or sensor calibration drift.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number8 / FA
Possible causes
- Exhaust leak upstream of sensor high
- Sensor zero point drifted medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–8 h
- Component: exhaust pressure sensor b2
- Component: particulate filter
- Component: exhaust system
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012