Buick Regal 2018-2026 Service Manual / Accessories and Equipment / Lighting / Diagnostic Information and Procedures
Buick Regal: Diagnostic Information and Procedures
- DTC B1395
- DTC B1480
- DTC B2530
- DTC B2545
- DTC B255D
- DTC B255F
- DTC B256C or B256D
- DTC B2570
- DTC B2575 or B2699
- DTC B257A
- DTC B257C or B257D
- DTC B2580 (T4A)
- DTC B2580 or B3866 (T4L)
- DTC B2585 or B3867
- DTC B258A (TT4)
- DTC B258A (TT6, TT2)
- DTC B258A or B258E
- DTC B2590 or B2595
- DTC B259A or B259B
- DTC B259C or B259D
- DTC B25FA or B25FB
- DTC B25FC or B25FD
- DTC B25F4 or B25F5
- DTC B25F6 or B25F7
- DTC B25F8 or B25F9
- DTC B2600 or B2605
- DTC B260B or B260C
- DTC B2610
- DTC B2615
- DTC B2625
- DTC B263A
- DTC B2652
- DTC B2740
- DTC B3410 or B3420
- DTC B3415
- DTC B3415 or B3425
- DTC B3435 or B3440
- DTC B3445 or B3878
- DTC B3588
- DTC B3596
- DTC B3650
- DTC B3806
- DTC B3881 or B3882
- DTC B3883
- DTC B3884
- DTC B388B or B388C
- DTC B3948 or B3949
- DTC B3950 or B3951
- DTC C0277 or C0890
- DTC C0297
- DTC P0504
- Symptoms - Lighting
- Adaptive Forward Lighting Malfunction
- Automatic Light Malfunction
- Backup Lamps Malfunction
- Cornering Lamps Malfunction
- Courtesy Lamps Malfunction
- Daytime Running Lamps Malfunction
- Dome Lamps Malfunction
- Front Fog Lamps Malfunction
- Rear Fog Lamps Malfunction
- Glove Box Illumination Malfunction
- High Intensity Discharge Lamp Malfunction
- Headlamps Malfunction
- Headlamp Leveling Malfunction (Manual)
- Headlamp Leveling Malfunction (Automatic)
- Interior Backlighting Malfunction
- Lights On Indicator Malfunction
- Park, License, and/or Tail Lamps Malfunction
- Rear Compartment Lamp Malfunction
- Stop Lamps Malfunction
- Sunshade Illumination Malfunction
- Turn Signal Lamps and/or Indicators Malfunction
READ NEXT:
DTC B1395
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
DTC B1480
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
DTC B2530
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
SEE MORE:
Rear Drive Axle
SPECIFICATIONS
FASTENER SPECIFICATIONS
Single Use Threaded Fastener/Component Tightening Specifications
NOTE:
All fasteners/components listed in this table MUST BE DISCARDED and replaced
with NEW
after removal.
Reusable Threaded Fastener Tightening Specifications
NOTE:
All fasteners listed in this
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 following are true:
There are no DTCs set.
The control modules can communicate via the serial data lin
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