C012E Buick 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 Buick 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 Buick 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 Buick?
- 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 Buick?
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 Buick 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 Buick Code
1. What does OBDII code C012E mean on a Buick?
C012E indicates a "Hydraulic Brake Boost Pressure Loss" issue, meaning the vehicle's brake system is detecting insufficient hydraulic pressure for proper operation.
2. What are the common symptoms of code C012E?
Symptoms may include a hard brake pedal, reduced braking performance, illuminated ABS or brake warning lights, and longer stopping distances.
3. What causes the C012E code to appear?
Common causes include a faulty brake booster, low brake fluid levels, hydraulic leaks, a failing brake pressure sensor, or issues with the hydraulic pump.
4. Can I drive my Buick with the C012E code active?
Driving with this code is not recommended as it can impair braking performance, increasing the risk of an accident.
5. How is the C012E code diagnosed?
A technician will check the brake fluid level, inspect for hydraulic leaks, test the brake pressure sensor, and verify proper operation of the brake booster and hydraulic pump.
6. How do I fix the C012E code on my Buick?
Repairs may involve topping off or flushing brake fluid, replacing a leaking brake line, repairing or replacing the brake booster, or addressing a faulty pressure sensor.
7. Is the C012E code related to the ABS system?
Yes, this code can trigger ABS and brake warning lights because the hydraulic pressure loss affects the ABS system's ability to function properly.
8. What tools are needed to troubleshoot the C012E code?
You may need an OBDII scanner, a brake fluid tester, a pressure gauge for hydraulic systems, and basic tools for inspecting and repairing brake components.
9. How much does it cost to repair code C012E on a Buick?
Repair costs vary widely based on the issue, ranging from $100 to $300 for sensor or fluid repairs, and up to $1,000 or more for brake booster or hydraulic pump replacement.
10. Can low brake fluid cause the C012E code?
Yes, low brake fluid is a common cause of this code, as it can lead to insufficient hydraulic pressure in the brake system.
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