Buick Repair Questions? Ask a Mechanic for Answers ASAP
When there are trouble codes stored in the ABS system, the AWD will automatically be disabled. The problem you are experiencing is likely a wiring issue. The common problem is breakage in the wiring harness leading to the front wheel speed sensor. This harness flexes every time the suspension moves or the wheels are turned, and it does eventually break. The wires will typically break inside the insulation so a visual inspection may not reveal the problem. Replacement harnesses are available online and through most auto parts retailers.
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