Toyota 4Runner Trouble Codes, Symptoms & Recalls
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Common check engine codes on the Toyota 4Runner
- 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 Toyota 4Runner symptoms
- Toyota 4Runner car shaking when braking
- Toyota 4Runner brakes squealing when stopping
- Toyota 4Runner check engine light on
- Toyota 4Runner car won't start
- Toyota 4Runner car overheating
- Toyota 4Runner car loses power when accelerating
- Toyota 4Runner car running or idling rough
- Toyota 4Runner white smoke from exhaust
- Toyota 4Runner blue smoke from exhaust
- Toyota 4Runner battery light on while driving
- Toyota 4Runner car pulls to one side
- Toyota 4Runner car ac not blowing cold
Maintenance & recalls
Toyota 4Runner maintenance resources · Toyota 4Runner NHTSA recalls & complaints