C012E GMC Code - Hydraulic Brake Boost Pressure Loss
Quick Answer
The boost pressure valve is internal to the brake pressure modulator. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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
- C012E GMC indicates Hydraulic Brake Boost Pressure Loss.
- Common causes
- Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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 C012E GMC Description
When a boost fault condition is detected, the boost control will continue applying as much pressure as possible until boost pressure is no longer available.
What are the Possible Causes of the DTC C012E GMC?
- Faulty Brake Pressure Modulator
- Brake Pressure Modulator harness is open or shorted
- Brake Pressure Modulator circuit poor electrical connection
How to Fix the DTC C012E 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
DTC C012E 12 Hydraulic Brake Boost Pressure Loss Low Input
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C012E 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 C012E GMC Code
1. What does the OBDII code C012E mean on a GMC vehicle?
The code C012E indicates a "Hydraulic Brake Boost Pressure Loss," meaning the system has detected insufficient hydraulic pressure in the brake boost system.
2. What are the common symptoms of the C012E code?
Symptoms include a hard brake pedal, reduced braking performance, ABS or brake warning lights on the dashboard, and increased stopping distance.
3. What causes the C012E code to appear?
Common causes include low hydraulic fluid levels, a malfunctioning hydraulic pump, a damaged brake booster, or faulty pressure sensors.
4. Can I still drive my GMC vehicle with the C012E code active?
It’s not recommended to drive with this code active, as it may lead to reduced braking capability, increasing the risk of an accident.
5. How is the C012E code diagnosed?
A technician will use a scan tool to confirm the code, inspect hydraulic fluid levels, check for leaks, test the pressure sensor, and verify the operation of the hydraulic pump.
6. How can the C012E code be fixed?
Repairs may involve refilling or flushing hydraulic fluid, replacing a faulty pressure sensor, repairing leaks, or replacing the hydraulic pump or brake booster if necessary.
7. Can low hydraulic fluid trigger the C012E code?
Yes, low hydraulic fluid is a common cause of this code, as it can lead to insufficient pressure in the brake boost system.
8. Is the C012E code related to the ABS system?
Yes, the code may impact the ABS system since it relies on proper hydraulic pressure for optimal operation.
9. How much does it cost to repair the C012E code on a GMC vehicle?
Repair costs can vary depending on the issue, ranging from $100 for a fluid refill to $1,000 or more for pump or booster replacement.
10. How can I prevent the C012E code from occurring?
Regularly check and maintain hydraulic fluid levels, inspect for leaks, and ensure the brake system is serviced according to the manufacturer’s recommendations.
Discuss the causes and fixes for C012E GMC OBDII Code
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