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