Re: Strange C4 problem... |
Subject: Re: Strange C4 problem... by Matatk on 2016/6/11 3:02:49 Speedo reading zero could be a bad vehicle speed sensor (VSS) in the transmission or the wiring of said sensor. That ultimately feeds the CCM which feeds the dash. What raises a red flag is you don't have any ALDL data which also comes from the CCM. Check the fuses first, and try the manual method for pulling codes and then get back to us. |