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Hey guys,

I am new to the club and this is my first post. I have been dealing with a check engine light that won't go away. It is reading a mis-fire in cylinders 1 and 4. I have changed the plugs and coils for all four cylinders and recently had the fuel sensor replaced. The car runs better and smoother after I first changed the plugs and coils however the light is still on. I live in a county with an emissions check as part of the annual inspection and if the check engine light is on, it is an automatic no-go. The mechanic said that everything else looks good, (no vacuum issue, no lean condition, etc)

Not really sure of the where to go next. As I mentioned above, it is a 2009 and has about 149,000 miles. In looking online, this situation is not uncommon and I'm hoping that someone here has had something similar and was able to get it resolved.

Thanks in advance!
Mike
 

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Try spark plugs and coils switch the coils around eg. #1 to #3 and # 4 to#2 and if the misfires switch cylinders that’s your problem but if you are going to change them do the whole set
 

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Hey guys,

I am new to the club and this is my first post. I have been dealing with a check engine light that won't go away. It is reading a mis-fire in cylinders 1 and 4. I have changed the plugs and coils for all four cylinders and recently had the fuel sensor replaced. The car runs better and smoother after I first changed the plugs and coils however the light is still on. I live in a county with an emissions check as part of the annual inspection and if the check engine light is on, it is an automatic no-go. The mechanic said that everything else looks good, (no vacuum issue, no lean condition, etc)

Not really sure of the where to go next. As I mentioned above, it is a 2009 and has about 149,000 miles. In looking online, this situation is not uncommon and I'm hoping that someone here has had something similar and was able to get it resolved.

Thanks in advance!
Mike
Did you figure out what was wrong ...why the check engine light appearing after?
 

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Check engine light concern.

Hey Guys,
After you change the spark plugs and coils will the check engine light reset on its own or do you have to clear the codes to make it go away. I changed my plugs and coils and the problem is gone....car idles perfectly, but Check engine light is on. Any ideas?
 

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The answer to that is yes!
Erase the codes with a scanner
If comes on again check cpv if that doesn’t do it look in to the injectors and gasket on the intake manifold also clean the air mass flow sensor , pour a bottle of sea foam on a full tank
and have you had the intake cleaned you migh have carbon buildup
 
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