BMW 320i (F30, B48 Petrol)
Turbo petrol patterns: trims, misfires under load, boost leaks and timing plausibility.
At a Glance
- Platform: BMW 320i (F30, B48 Petrol)
- Best approach: scan fully, confirm live data (boost, air mass, trims), then target the root cause before clearing codes.
Common Issues on This Platform
- DPF regeneration problems on diesel variants that do lots of short trips.
- EGR and intake contamination leading to air-mass plausibility faults.
- Boost leaks or actuator/control issues leading to underboost complaints.
- Misfires on petrol variants when plugs/coils are tired or trims are high.
Typical OBD2 Codes
These are common codes across BMW platforms. Use them with the BMW behaviour guides for a more accurate test plan.
- P2002 – DPF efficiency below threshold
- P2463 – DPF soot accumulation
- P0401 – EGR flow insufficient
- P0299 – Turbo underboost
- P0300 – Random misfire
- P0171 – System too lean
- P0016 – Crank/Cam correlation
How to Approach Diagnostics
- Record freeze-frame data and mileage.
- Check for related codes (DPF + EGR + boost often cluster).
- Use live data to confirm whether it's an air/boost issue, fuelling/trim issue, or after-treatment limitation.
- Fix the root cause first, then clear codes and confirm with a proper drive cycle.