Buick Regal 2018-2026 Service Manual / Accessories and Equipment / Mirrors / Diagnostic Information and Procedures
Buick Regal: Diagnostic Information and Procedures
- DTC B154A or B154B
- Symptoms - Mirrors
- Automatic Day-Night Mirrors Malfunction
- Power Mirror Malfunction (with A45)
- Power Mirror Malfunction (without A45)
- Power Mirror Tilt Inoperative in Reverse
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DTC B154A or B154B
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.
Diag
Symptoms - Mirrors
NOTE: The following steps must be completed before using the symptom
tables.
1. Perform the Diagnostic System Check - Vehicle before using the Symptom
Tables in order to
verify that all of the follo
Automatic Day-Night Mirrors Malfunction
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
Diagn
SEE MORE:
Engine Oil Life System
The engine oil life system calculates
engine oil life based on vehicle use
and displays the CHANGE ENGINE
OIL SOON message when it is time
to change the engine oil and filter.
The oil life system should be reset
to 100% only following an oil
change.
Resetting the Oil Life System
1. Using the DIC co
Adaptive Forward Lighting Malfunction
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.
Diagnostic Fault
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