Toyota 4runnerModerate URGENCY
Check Engine Light
What does this mean on a Toyota 4runner?
When you see the check engine light illuminate on the dashboard of your Toyota 4runner, it is a direct warning from the vehicle's onboard computer. The check engine light is part of your car's onboard diagnostics (OBD) system. It indicates an issue with the engine, emissions, or powertrain.
Common Causes for Toyota 4runner
Loose gas cap
Faulty oxygen sensor
Catalytic converter failure
Bad spark plugs or wires
Mass airflow sensor failure
What To Do Next
If it is solid, schedule a diagnostic check soon. If it is flashing, pull over safely and turn off the engine immediately as it indicates a severe misfire that could damage the catalytic converter.
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