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 DIAGNOSISBRAKESPARKING BRAKE SYSTEMDIAGNOSTIC 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
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC C028A, C028B, or C028F | DTC C028A 00 Park Brake Motor Circuit Malfunction DTC C028A 01 Park Brake Motor Circuit Short to Battery DTC C028A 02 Park Brake Motor Circuit Short to Ground DTC C028A 04 Park Brake Motor Circuit Open Circuit DTC C028A 05 Park Brake Motor Circuit Short to Battery or Open Circuit DTC C028A 08 Park Brake Motor Circuit Performance - Signal Invalid DTC C028A 28 Park Brake Motor Circuit Performance - Incorrect Frequency DTC C028A 61 Park Brake Motor Circuit Actuator Stuck DTC C028B 08 Park Brake Motor Position Sensor Signal Performance - Signal Invalid DTC C028B 26 Park Brake Motor Position Sensor Signal Low Frequency DTC C028B 29 Park Brake Motor Position Sensor Signal Too Few Pulses DTC C028B 2A Park Brake Motor Position Sensor Signal Too Many Pulses DTC C028F 01 Park Brake Solenoid Actuator Circuit Short to Battery DTC C028F 02 Park Brake Solenoid Actuator Circuit Short to Ground DTC C028F 08 Park Brake Solenoid Actuator Circuit Performance - Signal Invalid |
| DTC C027D or C028D | DTC C027D 64 Park Brake Slip Detected DTC C028D 00 Replace Park Brake Pad |
| DTC C0293 | DTC C0293 00 Park Brake Switch Malfunction DTC C0293 01 Park Brake Switch Short to Battery DTC C0293 02 Park Brake Switch Short to Ground DTC C0293 04 Park Brake Switch Open DTC C0293 06 Park Brake Switch Low Voltage/Open DTC C0293 08 Park Brake Switch Performance - Signal Invalid |
| DTC C0298 | DTC C0298 00 Park Brake Unlatch Switch Circuit Malfunction DTC C0298 01 Park Brake Unlatch Switch Circuit Short to Battery DTC C0298 02 Park Brake Unlatch Switch Circuit Short to Ground DTC C0298 04 Park Brake Unlatch Switch Circuit Open DTC C0298 08 Park Brake Unlatch Switch Circuit Performance - Signal Invalid |
| DTC C0558 | DTC C0558 55 Calibration Data Too Few Transitions DTC C0558 5A Calibration Data Not Plausible |
| DTC C0561 | DTC C0561 71 System Disabled Information Stored Invalid Data |
| DTC C056D | DTC C056D 00 Electronic Control Unit Hardware Malfunction DTC C056D 34 Electronic Control Unit Hardware RAM Malfunction DTC C056D 35 Electronic Control Unit Hardware ROM Malfunction DTC C056D 36 Electronic Control Unit Hardware EEPROM Performance/Malfunction DTC C056D 37 Electronic Control Unit Hardware Software Malfunction DTC C056D 38 Electronic Control Unit Hardware Supervision Software Malfunction DTC C056D 39 Electronic Control Unit Hardware Internal Malfunction DTC C056D 3B Electronic Control Unit Hardware Internal Self - Test Malfunction DTC C056D 3C Electronic Control Unit Hardware Internal Communication Malfunction |
| DTC C056E | DTC C056E 41 Electronic Control Unit Software Not Programmed DTC C056E 42 Electronic Control Unit Software Calibration Not Programmed DTC C056E 47 Electronic Control Unit Software VIN Not Programmed DTC C056E 5A Electronic Control Unit Software Not Plausible DTC C056E 71 Electronic Control Unit Software Invalid Data |
| DTC C0574 | DTC C0574 00 Printed Circuit Board Temperature Sensor Malfunction DTC C0574 01 Printed Circuit Board Temperature Sensor Short to Battery DTC C0574 02 Printed Circuit Board Temperature Sensor Short to Ground DTC C0574 54 Printed Circuit Board Temperature Sensor High |
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.