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Why is check engine light on my '05 trailblazer?

(2005 Chevrolet Trailblazer)
in Waterloo, IA on July 31, 2014
After analyzing, diagnostic codes are b0055, b0040, b0201, and p0128, what are they?
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Popular Answer
of Greg's Orange Auto on July 31, 2014
try going to aamco for diag and est then post results u have multiple issues
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