15.7 C
New York
September 25, 2023
Car Repair

Possible causes for just a car emission test failure

Last Updated on November 4, 2022 by SogouAuto


A number of things could cause your car to fail an emissions test. The most common reason is a simple problem with the gas cap; if the gas cap isn’t screwed on tightly enough, it can cause your car to “leak” gasoline vapors, which can contribute to air pollution. Another possibility is a problem with the evaporative control (EVAP) system, which is responsible for capturing and storing fuel vapors until they can be burned off by the engine. A faulty EVAP system can allow vapors to escape into the atmosphere.


Other potential causes of emission test failures include a dirty air filter, a malfunctioning oxygen sensor, or a problem with the catalytic converter. In some cases, the cause of the problem may not be apparent without further diagnosis; for example, a car that fails an emission test because of high levels of carbon monoxide might have an internal engine problem that needs to be repaired.


Related posts

Signs the Fuel Pump Has got On a 98 Jeep Grand Cherokee Limited


My Windshield Wipers Won’t Park


Six Vehicle Indicators Onto your nose Can Recognize