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  1. mazdaspeed_kas

    U0073 , U0121 and U0155 on a 2008 Mazdaspeed 3

    Hey guys. New to this forum, coming from MSF. My car threw these codes this morning and I’ve tried to do some research but can’t seem to find a definitive answer or solution to fix it. Codes: U0073 , U0121 and U0155. All I know is what the access port was saying is that it is comm issues...
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