Engine light code U0073 U0101 U0155 HELP - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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post #1 of 4 (permalink) Old 05-27-2011, 10:58 PM Thread Starter
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Engine light code U0073 U0101 U0155 HELP

What does each code stands for can someone help and what needs to be done?
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post #2 of 4 (permalink) Old 05-27-2011, 11:09 PM
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U0073 is a CAN bus communication error, U0155 is a communication error to the gauge cluster, U0101 is communication error to the TCM(transmission ecu)

i would just clear the codes and see if they come back. if it comes back then there may be a problem. possibly loose connection somewhere. double check the 10mm bolt on the ECU and make sure its tight(moreso snug)

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post #3 of 4 (permalink) Old 05-28-2011, 01:59 AM Thread Starter
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Also my AT light is on ( light next to the high beam). What is that sorry im bad with cars. Also got another code P0174. I cant believe i just brought this car and so many problems with it already fml.
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post #4 of 4 (permalink) Old 12-16-2014, 12:01 PM
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2003 mazda 6

i HAVE 2 CODES ON A 2003 MAZDA 6
U0073 AND A U0101
CKD WIRING AND CONNECTIONS i SEE NOTHING
WHERE DO I GO I HAVE NEVER EXPERIENCED THESE CODES AND WOULD APPRECIATE A LITTLE HELP IN WHERE TO GO
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