C028A GMC Code - Hand Brake Motor Circuit
Quick Answer
The hand brake control module has an internal motor, apply actuator, release actuator, and temperature sensor. Common causes include Faulty Hand Brake Motor, Hand Brake Motor harness is open or shorted, Hand Brake Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C028A GMC indicates Hand Brake Motor Circuit.
- Common causes
- Common causes include Faulty Hand Brake Motor, Hand Brake Motor harness is open or shorted, Hand Brake Motor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C028A GMC Description
The hand brake will self diagnose the internal Hand brake Motor Circuit. This circuit is used to drive the motor, which pulls on the hand brake cable, ultimately applying and releasing the hand brake.
What are the Possible Causes of the DTC C028A GMC?
- Faulty Hand Brake Motor
- Hand Brake Motor harness is open or shorted
- Hand Brake Motor circuit poor electrical connection
How to Fix the DTC C028A GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
- C028A 02: Hand Brake Motor Circuit Short to Ground
- C028A 04: Hand Brake Motor Circuit Open Circuit
- C028A 08: Hand Brake Motor Circuit Performance-Signal Invalid
- C028A 28: Hand Brake Motor Circuit Performance-Incorrect Frequency
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C028A GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C028A GMC Code
1. What does the OBDII code C028A mean on a GMC vehicle?
C028A indicates an issue with the Hand Brake Motor Circuit, which is part of the electronic parking brake system.
2. What are the symptoms of the C028A code on a GMC?
Common symptoms include the parking brake not engaging or releasing, a warning light on the dashboard, or a parking brake error message.
3. What causes the C028A code to appear?
The code can be triggered by a faulty hand brake motor, damaged wiring or connectors, a blown fuse, or a malfunctioning electronic parking brake module.
4. How can I diagnose the C028A code on my GMC?
Use a diagnostic scanner to confirm the code, visually inspect the hand brake motor and its wiring, and test the circuit for proper voltage and continuity.
5. Can a bad parking brake switch cause the C028A code?
While not the most common cause, a faulty parking brake switch could potentially contribute to this issue if it disrupts the motor's operation.
6. Is it safe to drive with the C028A code active?
It may be unsafe, as the parking brake may not function properly, increasing the risk of the vehicle rolling when parked.
7. How do you fix the C028A code on a GMC?
Repairs may include replacing the hand brake motor, repairing damaged wiring or connectors, or replacing the electronic parking brake module.
8. How much does it cost to fix the C028A code on a GMC?
Repair costs vary but typically range from $200 to $600, depending on whether the motor, wiring, or module needs replacement.
9. Can a weak battery trigger the C028A code?
Yes, a weak or failing battery can cause electronic parking brake issues, including the C028A code, due to insufficient power supply.
10. Do I need to reprogram the electronic parking brake module after fixing the C028A code?
In some cases, reprogramming or resetting the module may be required to clear the code and restore proper function.
Discuss the causes and fixes for C028A GMC OBDII Code
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