What are the causes of the air-fuel ratio malfunction in the Teana?

1 Answers
AngelaDella
07/29/25 7:31pm
Teana air-fuel ratio malfunction causes: Fuel emission system malfunction: The air-fuel ratio malfunction is caused by the fuel emission system. When the malfunction indicator light is on, start and turn off the vehicle three times, then start the vehicle again to observe whether the malfunction indicator light remains on. If it remains on, it is necessary to promptly go to the shop to check the fault code to determine whether it is an engine issue or a sensor malfunction. If the light does not come back on, it may be an intermittent fault and does not require immediate shop inspection. Abnormal exhaust emissions: When the computer receives parameters from the oxygen sensor indicating that the exhaust emissions severely exceed the national legal standards, and the computer's internal program cannot adjust them back to the standard range, the engine control computer will then illuminate the pollution emission warning light on the dashboard to alert the owner to check the cause of the engine pollution emission light at a service station.
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