C1220 Chevrolet Code - Brake Pressure Sensor Supply Voltage Circuit High
Quick Answer
The C1220 code for Chevrolet vehicles indicates a problem with the brake pressure sensor supply voltage circuit being too high. Common causes include Faulty brake pressure sensor, Wiring or connector issues in the brake pressure sensor circuit, Corrosion or damage to the sensor or circuit components. 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
- C1220 Chevrolet indicates Brake Pressure Sensor Supply Voltage Circuit High.
- Common causes
- Common causes include Faulty brake pressure sensor, Wiring or connector issues in the brake pressure sensor circuit, Corrosion or damage to the sensor or circuit components.
- 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.
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Code C1220 Chevrolet Description
The C1220 code for Chevrolet vehicles indicates a problem with the brake pressure sensor supply voltage circuit being too high. The brake pressure sensor is a crucial component of the vehicle's anti-lock braking system (ABS) as it measures the hydraulic pressure within the brake system. This information is used by the ABS module to determine the appropriate brake force distribution to prevent wheel lock-up during braking.
Common Causes of C1220 Chevrolet
- Faulty brake pressure sensor.
- Wiring or connector issues in the brake pressure sensor circuit.
- Corrosion or damage to the sensor or circuit components.
- Electrical system malfunctions affecting sensor voltage levels.
Symptoms of C1220 Chevrolet
- Illumination of the ABS warning light on the dashboard.
- Increased stopping distance during braking.
- ABS system engaging unexpectedly or inconsistently.
- Loss of traction or stability during braking maneuvers.
- Unusual noises or sensations coming from the brake system.
How to Fix C1220 Chevrolet
- Begin by connecting a diagnostic scanner to retrieve the specific trouble codes and confirm the presence of the C1220 code.
- Inspect the brake pressure sensor, wiring, and connectors for any visible damage, corrosion, or loose connections.
- Test the voltage levels in the sensor circuit to determine if they are within the specified range.
- Replace the brake pressure sensor if it is found to be faulty or not functioning correctly.
- Clear the trouble codes from the ABS module memory and perform a test drive to verify that the issue has been resolved.
Cost to Fix C1220 Chevrolet
The typical repair costs for addressing a C1220 code on a Chevrolet vehicle can range from $200 to $500, depending on the extent of the issue and the specific components that require replacement. This estimate includes the cost of parts such as a new brake pressure sensor and any necessary labor charges. It is important to note that actual repair costs can vary based on factors such as the vehicle's make and model, the technician's hourly labor rate, and any additional diagnostic or repair services that may be needed. It is advisable to consult with a trusted auto repair shop for a more accurate cost estimate tailored to your specific situation.
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Information for Specific Chevrolet Models
- C1220 2014 Chevrolet Silverado — Brake Pressure Sensor Supply Voltage Circuit High
- C1220 2015 Chevrolet Silverado — Brake Pressure Sensor Supply Voltage Circuit High
- C1220 2016 Chevrolet Silverado — Brake Pressure Sensor Supply Voltage Circuit High
- C1220 2017 Chevrolet Silverado — Brake Pressure Sensor Supply Voltage Circuit High
- C1220 2018 Chevrolet Silverado — Brake Pressure Sensor Supply Voltage Circuit High
Frequently Asked Questions about C1220 Chevrolet Code
1. What does the OBDII code C1220 mean on a Chevrolet?
C1220 indicates a "Brake Pressure Sensor Supply Voltage Circuit High," meaning the brake pressure sensor is detecting an abnormally high voltage in its supply circuit.
2. What are the common symptoms of the C1220 code in a Chevrolet?
Symptoms may include illuminated ABS and traction control warning lights, reduced ABS functionality, or erratic brake performance.
3. What causes the C1220 code to appear in a Chevrolet?
Common causes include a faulty brake pressure sensor, damaged wiring or connectors in the sensor circuit, a defective ABS module, or electrical issues such as short circuits or voltage spikes.
4. Can I still drive my Chevrolet with the C1220 code?
While you can drive the vehicle, the ABS and traction control systems may not function properly, increasing the risk of skidding or losing control in emergency braking situations.
5. How do you diagnose the C1220 code on a Chevrolet?
Diagnosis involves using a scan tool to confirm the code, inspecting the brake pressure sensor and its wiring for damage or corrosion, and testing the circuit for proper voltage and ground.
6. How do you fix the C1220 code on a Chevrolet?
Repairs may include replacing the brake pressure sensor, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ABS module if necessary.
7. How much does it cost to repair the C1220 code on a Chevrolet?
Repair costs vary depending on the issue but typically range from $100 to $300 for parts and labor, with higher costs if the ABS module needs replacement.
8. Can a bad battery cause the C1220 code in a Chevrolet?
Yes, a weak or failing battery can cause voltage irregularities, potentially triggering the C1220 code if the supply voltage to the brake pressure sensor is affected.
9. How can I prevent the C1220 code from occurring in my Chevrolet?
Regularly inspect and maintain the brake system, including checking sensor connections for corrosion, ensuring wiring is intact, and replacing worn components as needed.
10. Will clearing the C1220 code fix the issue on a Chevrolet?
Clearing the code may temporarily turn off the warning light, but the underlying issue needs to be resolved; otherwise, the code will likely return.
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