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