Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 230 (HVAC SYSTEM - MANUAL)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2013 Buick Regal Turbo Premium, Standard Trans
Diagnostic Code Index
2013 Buick Regal Turbo Premium, Standard TransSECTION Diagnostic Code Index
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC B0193 | DTC B0193 01: Front Blower Motor Speed Circuit Short to Battery DTC B0193 06: Front Blower Motor Speed Circuit Low Voltage/Open |
| DTC B0223, B0233, B023A, B0408 | DTC B0223 01: Recirculate Position Command 1 Circuit Short to Battery DTC B0223 06: Recirculate Position Command 1 Circuit Low Voltage/Open DTC B0233 01: Air Flow Control Circuit Short to Battery DTC B0233 06: Air Flow Control Circuit Low Voltage/Open DTC B023A 02: HVAC Actuators Supply Voltage Short to Ground DTC B0408 01: Main Temperature Control Circuit Short to Battery DTC B0408 06: Main Temperature Control Circuit Low Voltage/Open |
| DTC B3933 | DTC B3933 02: Air Conditioning Evaporator Temperature Sensor Circuit Short to Ground DTC B3933 05: Air Conditioning Evaporator Temperature Sensor Circuit High Voltage/Open |
| DTC B393B | DTC B393B 04: Air Conditioning Compressor Valve Control Circuit Open DTC B393B 0B: Air Conditioning Compressor Valve Control Circuit High Current |
| DTC P0532 or P0533 | DTC P0532: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage DTC P0533: Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage |
| DTC P0645, P0646, or P0647 | DTC P0645: Air Conditioning (A/C) Compressor Clutch Relay Control Circuit DTC P0646: Air Conditioning (A/C) Compressor Clutch Relay Control Circuit Low Voltage DTC P0647: Air Conditioning (A/C) Compressor Clutch Relay Control Circuit High Voltage |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.