Q: Q: Check engine light

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My engine light won't go out. I have had 3 new cats put in, a tune-up, new O2 sensors. Please help me no mechanic seems to know why it won't go out.


My car has 128000 miles.
My car has an automatic transmission.

Hi Shawnice, Generally, the check engine light comes on when something fairly serious is going on with the vehicle such as the catalytic converters you mentioned. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, bad spark plugs or wires and many other reasons. Due to the fact that the catalytic converters have been replaced 3 times, this may suggest that there are other problems with the vehicle that may also be causing the light to come on. Due to the wide range of possibilities for the check engine light to come on, the best and most efficient way to narrow down the scope of what may be causing this is to have the vehicle hooked up to a scanning tool to download any potential fault codes that may have registered in the computer. This will allow a mechanic to determine more specifically what to look for in diagnosing your vehicle. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle to determine what may be causing your check engine light to come on.

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