BMW 3 Series Trouble Codes, Symptoms & Recalls
Reviewed by the Wrenchit.ai editorial team · Last reviewed · Editorial standards
Common check engine codes on the BMW 3 Series
- P0420 — Catalyst System Efficiency Below Threshold (Bank 1)
- P0300 — Random/Multiple Cylinder Misfire Detected
- P0171 — System Too Lean (Bank 1)
- P0442 — Evaporative Emission System Small Leak Detected
- P0455 — Evaporative Emission System Large Leak Detected
- P0128 — Coolant Temperature Below Thermostat Regulating Temperature
- P0401 — EGR Insufficient Flow Detected
- P0440 — Evaporative Emission Control System Malfunction
- P0301 — Cylinder 1 Misfire Detected
- P0174 — System Too Lean (Bank 2)
Common BMW 3 Series symptoms
- BMW 3 Series car shaking when braking
- BMW 3 Series brakes squealing when stopping
- BMW 3 Series check engine light on
- BMW 3 Series car won't start
- BMW 3 Series car overheating
- BMW 3 Series car loses power when accelerating
- BMW 3 Series car running or idling rough
- BMW 3 Series white smoke from exhaust
- BMW 3 Series blue smoke from exhaust
- BMW 3 Series battery light on while driving
- BMW 3 Series car pulls to one side
- BMW 3 Series car ac not blowing cold
Maintenance & recalls
BMW 3 Series maintenance resources · BMW 3 Series NHTSA recalls & complaints