Buick Regal 2018-2025 Service Manual / HVAC & Restraints / HVAC - Automatic / Diagnostic Information and Procedures
Buick Regal: Diagnostic Information and Procedures
HVAC COMPONENT REPLACEMENT REFERENCE
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- DTC B0163
- DTC B0163, B0183, or B1405
- DTC B0173, B0178, B0509, B0514 or B3933
- DTC B018A, B048C, B048F, or B1395
- DTC B0183
- DTC B0193
- DTC B0223, B022A, B0233, B023A, B0408, or B0418
- DTC B269A, B269C, or B269D
- DTC B3843
- DTC B393B
- DTC P0532 or P0533
- DTC P0645, P0646, or P0647
- Symptoms - HVAC Systems - Automatic
- Air Conditioning Compressor Malfunction
- Afterblow Enabling
READ NEXT:
DTC B0163
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 B0163, B0183, or B1405
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 B0173, B0178, B0509, B0514 or B3933
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:
Antilock Brake System (ABS)
Warning Light
This light comes on briefly when the
engine is started.
If the light does not come on, have it
fixed so it will be ready to warn if
there is a problem.
If the light comes on while driving,
stop as soon as it is safely possible
and turn off the vehicle. Then start
the engine again to reset the
sys
Afterblow Enabling
Afterblow is a feature that dries the evaporator core by operating the blower
motor after the engine is
turned off. This aids in reducing microbial growth that can create undesirable
odors.
The vehicle does not come equipped with the afterblow feature turned on. If the
afterblow feature is
requi
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