Ford Focus Trouble Codes, Symptoms & Recalls
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Common check engine codes on the Ford Focus
- 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 Ford Focus symptoms
- Ford Focus car shaking when braking
- Ford Focus brakes squealing when stopping
- Ford Focus check engine light on
- Ford Focus car won't start
- Ford Focus car overheating
- Ford Focus car loses power when accelerating
- Ford Focus car running or idling rough
- Ford Focus white smoke from exhaust
- Ford Focus blue smoke from exhaust
- Ford Focus battery light on while driving
- Ford Focus car pulls to one side
- Ford Focus car ac not blowing cold
Maintenance & recalls
Ford Focus maintenance resources · Ford Focus NHTSA recalls & complaints