Auto Stop-Start Mystery


For this month’s tech resource, we’ve got another electrical mystery, this time on a 2019 Chevrolet Impala equipped with Auto Stop/Start function, courtesy of William in West Virginia. The complaint was that the vehicle wouldn’t resume operation after a Stop event. The initial diagnosis found no codes set and William was unable to replicate the complaint. But, he did identify what he thought was the issue, a low battery condition on both batteries (primary and auxiliary). When it came back three days later, he knew he had to dig deeper, which led him to perform CAN diagnostics and get to the root of the problem. Click the link to see how the mystery unfolded.

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