C012B GMC Code - High Pressure Accumulator Pressure Sensor
Quick Answer
The high pressure accumulator is attached to the brake pressure modulator and provides up to 18, 000 kPa (2, 600 psi) for use when applying the brakes. 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
- C012B GMC indicates High Pressure Accumulator Pressure Sensor.
- 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 C012B GMC Description
What are the Possible Causes of the DTC C012B 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 C012B 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 C012B 06 High Pressure Accumulator Pressure Sensor Low Voltage/Open
DTC C012B 0F High Pressure Accumulator Pressure Sensor Signal Erratic
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C012B 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 C012B GMC Code
What does the OBDII code C012B mean for a GMC vehicle?
C012B indicates an issue with the High Pressure Accumulator Pressure Sensor, which monitors pressure in the braking or suspension systems.
What are common symptoms of code C012B on a GMC?
Symptoms can include a warning light on the dashboard, reduced braking performance, or issues with stability control.
What causes the C012B code to appear on a GMC?
Common causes include a faulty pressure sensor, damaged wiring or connectors, or issues within the accumulator itself.
Can driving with code C012B harm my GMC vehicle?
Yes, driving with this code can lead to reduced braking or stability performance, which may compromise safety.
How do you diagnose the C012B code on a GMC?
A mechanic typically uses a diagnostic scanner to read the code and checks the pressure sensor, wiring, and accumulator for faults.
Can I fix the C012B code myself on my GMC?
If you’re experienced with vehicle repairs, you can inspect the wiring and replace the sensor, but professional diagnosis is recommended.
How much does it cost to repair the C012B code on a GMC?
Repair costs can vary depending on the exact issue but typically range from $150 to $500, including parts and labor.
Is replacing the High Pressure Accumulator Pressure Sensor a common fix for code C012B?
Yes, replacing the sensor is a common solution if it’s found to be faulty during diagnosis.
Does the C012B code affect performance or fuel efficiency?
While it doesn’t directly affect fuel efficiency, it can impact vehicle performance by reducing braking or stability control functionality.
How can I prevent the C012B code from recurring on my GMC?
Regular maintenance, such as inspecting wiring and ensuring components are clean and undamaged, can help prevent this code from recurring.
Discuss the causes and fixes for C012B GMC OBDII Code
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