What does it mean when on-road exhaust emission test is not determined?
1 Answers
The meaning of on-road exhaust emission test not being determined is that the vehicle's exhaust emissions are non-compliant. Solutions for vehicles with substandard exhaust emissions are as follows: 1. Three-way catalytic converter and oxygen sensor: The three-way catalyst and front oxygen sensor. When the engine's air-fuel mixture burns incompletely, a large amount of carbon deposits will be generated. These carbon deposits will be discharged through the exhaust pipe and adhere to the interior of the three-way catalytic converter and the surface of the oxygen sensor. Therefore, cleaning the three-way catalytic converter and oxygen sensor can solve many vehicle exhaust non-compliance issues. 2. Clean or replace spark plugs: Faults in the ignition system such as spark plugs and high-voltage coils can also cause excessive vehicle emissions. Spark plugs are wearable parts and most prone to problems. Poor spark plug condition will lead to increased emission pollution. 3. Deep cleaning of the engine: If this situation occurs, and after confirming that sensors such as the air flow meter and temperature sensor are not faulty, then it is necessary to perform a major maintenance to clean carbon deposits in the engine. Cleaning the throttle, fuel system, intake tract, fuel injectors, etc. After thoroughly cleaning the internal carbon deposits of the engine, the engine's operating condition will also improve significantly.
