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  1. ErSS Chassis Codes C0231 and C0421

    Drivetrain
    Hi - First time posting here. I have an ErSS code on my dash. Driving 2007 B9 Tribeca. I eventually worked my way through some forums and was able to get the chassis codes. I'm pretty sure I have a speed sensor issue, but I'm trying to figure out which wheel it's coming from, and I expected...
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