Buick Regal: Immobilizer

 DTC P0102 or P0103

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

 Power Transfer Unit Case Cleaning and Inspection

Power Transfer Unit Case Housing Cleaning and Inspection Preliminary Procedure Clean the power transfer unit case housing. The case halves, internal gears and bearings are not serviceable components. If damage is present, the power transfer unit must be replaced as an assembly. Power Trans