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What does it mean when it says check emission system?

CARS.COM — The check engine light on the dashboard is a warning that many vehicle owners dread. The check engine light is a signal that the onboard diagnostics system (or OBD II) has detected a malfunction in the vehicle’s emissions, ignition, fuel or exhaust systems.


How much does it cost to fix emission system?

If your vehicle failed emission testing and it needs repairing, then the cost will depend on the exact cause, but the repair work typically starts around $200. Replacing your exhaust system depends on the type of car you drive, but that work starts at approximately $175.


How do you fix an engine emission warning?

Turn the key in the ignition to the ‘ON’ position. Reconnect the positive battery cable and turn the key in the ignition, wait a few minutes and the CEL should be gone. If neither of these work, it’s best to take your vehicle into a garage so that a professional can reset your light.


Can bad gas cause emissions problems?

A loose or broken gas cap can dramatically reduce fuel efficiency and increase emissions. MAF sensor – Mass airflow sensors are a common item to go bad in vehicles.


What causes emission control system malfunction?

Leaking or damaged carbon canister – Corrosion or even collision damage can cause the carbon canister to crack and fail. Faulty EVAP vent valve and/or faulty EVAP purge valve – Stuck valve openings can impede the normal function of the EVAP system, causing a leak to be detected.

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Can I drive with my check engine light on?

If the check engine light turns on and is steady, not flashing, you can keep driving as long as your vehicle isn’t performing out of the ordinary. A steady light is your car’s way of telling you your car is in need of service.


Can you pass emissions with check engine light?

A vehicle will not pass an emissions test when the check engine light is on. If the battery has been disconnected or the trouble codes erased, you will have to drive the vehicle under varying conditions for up to one week before it will pass.


Can AutoZone tell me why my engine light is on?

AutoZone can diagnose Check Engine Light codes, yes. If your engine light turned on and you are wondering why, head down to your local AutoZone where one of our store associates can help diagnose the issue through our free Fix Finder service.


Is emission service necessary?

Emissions tests are a key part of car maintenance and are good all around because they keep you car running better, longer and more efficiently; and they ultimately keep our environment cleaner.


What is emission problem?

Vehicle emissions are treated to ensure carbon monoxide and other dangerous gases are converted to safer gases before being released into the environment. If you smell gasoline inside the cabin of your car or outside of it, you’ve got an emissions problem.

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