Buick Regal: Diagnostic Information and Procedures

 DTC P0461-P0464, P2066, P2067, or P2068 (with F46 (AWD) )

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors D

 Hydraulic Brake Component Operation Visual Inspection

1. WARNING: Refer to Brake Fluid Irritant Warning. CAUTION: Refer to Brake Fluid Effects on Paint and Electrical Components Caution. With the tire and wheel assemblies removed and the brake rotors retained by wheel lug nuts, visually inspect the caliper piston dust boot (2) sealing area to ensure