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sprinkles08
sprinkles08, ASE Certified Technician
Category: UK Car
Satisfied Customers: 21599
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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What does the code Dtcc129 (ABS/ECU MULTIPLEX TRANSMISSION

Customer Question

what does the code Dtcc129 (ABS/ECU MULTIPLEX TRANSMISSION ABSENT ) mean. Can it be a faulty wheel bearing sensor
Submitted: 1 year ago.
Category: UK Car
Expert:  sprinkles08 replied 1 year ago.

Hello and welcome to JustAnswer!

This issue will be deeper than just a failed wheel speed sensor. This code sets in a module when it isn't able to communicate with the ABS module. I'm assuming your ABS light is on, if the ABS light is on and this is setting in one or more modules then the ABS module isn't communicating. It will take some electrical testing to see exactly what is going on, if the ABS module isn't communicating it's either because of a loss of power or ground to it, an open communication bus circuit to it, or the module itself may have failed.