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I have a 2004 chevy impala that the check engine light flashes above 30 mph, also chugging real bad at a idle. I have changed fuel cap, fuel filter,o2 senor, ran a bottle of fuel injector cleaner also, I am at a loss please help? :cry:


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Location: Oregon
when the check engine light is flashing it is trying to tell you that you might be damaging your catalytic converter. The check engine light comes on when you set a code that affects your emissions. it flashes when you could be damaging your vehicle with continued driving. Have your car scanned and see what codes are stored. Look at the freeze frames to see what was happening when the codes were set.

the check engine light is not a maintenance light. there are hundreds and hundreds of codes that you vehicle can have. It's like the oil pressure light. Battery light. When it comes on, it means you should find out what's happening. It could be something simple or it may be something complicated but if you don't scan it to see what it is, you may cause more damage that will cost you more money to fix.


   
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