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Q: have code p0449 that appears twice when scanned on 2006 Chevrolet Trailblazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my 2006 chevy trailblazer keeps idleling and the reduced engine light appears and check engine light and traction light appears changed 125fuse, all fuses ,AMF, throttle body, fuel filter sensor, pedal sensor still idling rough but runs fine sometimes want to be sure that is the problem
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