Pipe Cel

check engine light on?

I drive a Auto 02 corolla with 120,000 miles. when the check engine light came on back in may, friend drove it to the shop for 2 days to fix. After i got it back i was told the exhaust pipe needs to be replaced(or something with the exhaust system i wasn't there) so the CEL dissapeared for a week then came back on, i been driving it with the CEL on since may, it makes very loud noise when i step on the gas pedal. should i keep driving it? it doesnt affect the engine right?
Thanks

If the Check engine light is on get is scanned and then see what the code means. Alot of times people just guess and problems can look the same to the untrained eye, the codes will give you a direction to look in. Don't wait get it scanned.

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