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C1219 2018 GMC Sierra Code - Brake Pressure Sensor Supply Voltage Circuit Low

Quick Answer

The C1219 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Brake Pressure Sensor Supply Voltage Circuit being too low. Common causes include Faulty brake pressure sensor, Corroded or damaged wiring/connectors in the brake pressure sensor circuit, Low battery voltage affecting the sensor's operation. 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
C1219 2018 GMC Sierra indicates Brake Pressure Sensor Supply Voltage Circuit Low.
Common causes
Common causes include Faulty brake pressure sensor, Corroded or damaged wiring/connectors in the brake pressure sensor circuit, Low battery voltage affecting the sensor's operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code C1219 2018 GMC Sierra Description

The C1219 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the Brake Pressure Sensor Supply Voltage Circuit being too low. The brake pressure sensor is a crucial component of the vehicle's anti-lock braking system (ABS) that measures the hydraulic pressure within the brake system. This information is used by the ABS module to regulate brake pressure during emergency braking or slippery road conditions, ensuring optimal braking performance and vehicle stability.

OBDII Code C1219 2018 GMC Sierra - Brake Pressure Sensor Supply Voltage Circuit Low
C1219 2018 GMC Sierra Code - Brake Pressure Sensor Supply Voltage Circuit Low

Common Causes of C1219 2018 GMC Sierra

  1. Faulty brake pressure sensor.
  2. Corroded or damaged wiring/connectors in the brake pressure sensor circuit.
  3. Low battery voltage affecting the sensor's operation.
  4. Issues with the ABS module or related components.
  5. Electrical faults in the vehicle's wiring system.

Symptoms of C1219 2018 GMC Sierra

  1. Illumination of the ABS warning light on the dashboard.
  2. Increased stopping distance or reduced braking effectiveness.
  3. ABS system engaging unexpectedly or not engaging when needed.
  4. Loss of traction control functionality.
  5. Unusual noises coming from the ABS module or brake system.

How to Fix C1219 2018 GMC Sierra

  1. Begin by performing a thorough visual inspection of the brake pressure sensor and its wiring harness for any signs of damage, corrosion, or loose connections.
  2. Use a multimeter to test the voltage supply to the brake pressure sensor and ensure it meets the manufacturer's specifications.
  3. If the voltage is low, check the battery voltage and charging system to rule out any issues with the vehicle's electrical system.
  4. Replace the brake pressure sensor if it is found to be faulty or not receiving adequate voltage.
  5. Clear the DTC from the vehicle's computer using a diagnostic scan tool and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix C1219 2018 GMC Sierra

The typical repair costs for addressing a Brake Pressure Sensor Supply Voltage Circuit Low issue can vary depending on the specific cause of the problem and the cost of parts and labor. In general, replacing a faulty brake pressure sensor can range from $150 to $300, while addressing wiring or electrical issues may increase the total repair cost. Additionally, labor rates at auto repair shops can vary between $80 and $150 per hour, so it's advisable to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for C1219 2018 GMC Sierra

Some vehicles have the Steering Angle Sensor integrated into the Clockspring.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1219 2018 GMC Sierra Code

1. What does the OBDII code C1219 mean on a 2018 GMC Sierra?

The code C1219 indicates a problem with the brake pressure sensor supply voltage circuit being too low, which can affect brake system performance.

2. What are the common symptoms of code C1219 in a 2018 GMC Sierra?

Common symptoms include illuminated ABS or brake warning lights, reduced braking performance, or erratic brake pedal feel.

3. What causes the C1219 code on a GMC Sierra?

Causes can include a faulty brake pressure sensor, damaged wiring or connectors, or issues with the ABS module.

4. Can I still drive my 2018 GMC Sierra with the C1219 code?

While the truck may still drive, it’s not safe to continue driving with compromised brake system performance. Immediate inspection and repair are recommended.

5. How do I diagnose code C1219 on a 2018 GMC Sierra?

Diagnosis involves checking the brake pressure sensor, inspecting the wiring and connectors for damage, and testing the ABS module for faults.

6. How can I fix the C1219 code on my GMC Sierra?

Repairs may include replacing the brake pressure sensor, fixing damaged wiring, or repairing or replacing the ABS module.

7. What tools are needed to troubleshoot the C1219 code?

Tools like an OBDII scanner, a multimeter, and wiring diagrams for the 2018 GMC Sierra are essential for troubleshooting.

8. How much does it cost to repair the C1219 code?

Repair costs vary, but replacing a brake pressure sensor typically costs $100-$300, while ABS module repairs can cost $500-$1,500.

9. Can a low battery voltage cause the C1219 code?

Yes, insufficient voltage from the battery can potentially trigger this code, as it affects the supply voltage to the brake pressure sensor.

10. Do I need to reprogram the ABS module after fixing the C1219 code?

In some cases, if the ABS module is replaced, it may need to be reprogrammed using specialized diagnostic equipment.

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