DTC P0646 Buick

Lost Communication with XXX

Lost Communication with XXX

Description

Diagnostic trouble codes B1327, B1328, U1300, U1301, and U1305 do not have a current status. Any particular device on the class 2 serial data circuit will support some subset of these DTCs. The vehicle power mode (ignition switch position) requires

Video Guide

Duration: PT4M18S | Uploaded: 2020-06-15

Diagnostic Info

  • DTC Code: P0646
  • Brand: Buick
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