C1220 2017 GMC Sierra Code - Brake Pressure Sensor Supply Voltage Circuit High
Quick Answer
The C1220 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Brake Pressure Sensor Supply Voltage Circuit being too high. Common causes include Faulty brake pressure sensor, Corroded or damaged wiring in the sensor circuit, Loose or poor connections at the sensor or ECU. 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 2017 GMC Sierra indicates Brake Pressure Sensor Supply Voltage Circuit High.
- Common causes
- Common causes include Faulty brake pressure sensor, Corroded or damaged wiring in the sensor circuit, Loose or poor connections at the sensor or ECU.
- 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 2017 GMC Sierra Description
The C1220 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Brake Pressure Sensor Supply Voltage Circuit being too high. This sensor is responsible for monitoring the brake system's hydraulic pressure and providing data to the vehicle's electronic control unit (ECU). When the voltage in the circuit is higher than expected, it can lead to issues with the brake system's performance and safety.
Common Causes of C1220 2017 GMC Sierra
- Faulty brake pressure sensor
- Corroded or damaged wiring in the sensor circuit
- Loose or poor connections at the sensor or ECU
- ECU malfunction or software issue
- Electrical issues such as a short circuit or voltage spike
Symptoms of C1220 2017 GMC Sierra
- Illuminated ABS warning light on the dashboard
- Increased brake pedal effort required to stop the vehicle
- Inconsistent brake pressure when applying the brakes
- ABS system engaging unexpectedly or more frequently
- Decreased overall braking performance
How to Fix C1220 2017 GMC Sierra
- Begin by conducting a thorough inspection of the brake pressure sensor, wiring, and connectors for any visible damage or corrosion.
- Use a multimeter to test the voltage output of the brake pressure sensor and compare it to the manufacturer's specifications.
- If the sensor is faulty, replace it with a new OEM or high-quality aftermarket sensor.
- Check and repair any damaged wiring or connectors in the sensor circuit.
- Clear the DTC from the ECU's memory using a diagnostic scan tool and perform a test drive to ensure the issue has been resolved.
Cost to Fix C1220 2017 GMC Sierra
The typical repair costs for addressing a C1220 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty brake pressure sensor can cost between $150 to $300, while repairing damaged wiring or connectors may range from $100 to $200. Labor costs at an auto repair shop can add an additional $80 to $150 per hour, with the total repair bill potentially amounting to $300 to $600 or more. It is advisable to consult with a qualified mechanic or dealership to obtain a more accurate estimate based on the specific circumstances of the vehicle.
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Frequently Asked Questions about C1220 2017 GMC Sierra Code
1. What does the OBDII code C1220 mean on a 2017 GMC Sierra?
C1220 indicates a problem with the Brake Pressure Sensor Supply Voltage Circuit, specifically that the voltage is higher than the expected range.
2. What are the symptoms of the C1220 code on a 2017 GMC Sierra?
Common symptoms include an illuminated ABS warning light, traction control issues, and potential loss of ABS functionality.
3. What causes the C1220 code on a 2017 GMC Sierra?
Possible causes include a faulty brake pressure sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning ABS control module.
4. Can I drive my 2017 GMC Sierra with the C1220 code?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, increasing the risk of losing control in slippery conditions.
5. How do I diagnose the C1220 code on my 2017 GMC Sierra?
Check the brake pressure sensor and its wiring for damage or corrosion, use a multimeter to test the circuit voltage, and scan the ABS module for related codes.
6. How is the C1220 code fixed on a 2017 GMC Sierra?
Repairs may involve replacing the brake pressure sensor, repairing or replacing damaged wiring, or reprogramming or replacing the ABS control module if necessary.
7. How much does it cost to fix the C1220 code on a 2017 GMC Sierra?
The cost varies depending on the issue, but replacing the brake pressure sensor typically costs $100-$300, while ABS module repairs can be more expensive.
8. Can a low battery cause the C1220 code on a 2017 GMC Sierra?
A low or weak battery can sometimes cause electrical issues, but C1220 is more commonly caused by a specific fault in the brake pressure sensor circuit.
9. How do I prevent the C1220 code from occurring again?
Regularly inspect the brake pressure sensor and its wiring for damage, ensure connectors are secure and clean, and address any ABS system issues promptly.
10. Is the C1220 code covered under warranty for a 2017 GMC Sierra?
It depends on your vehicle’s warranty coverage and mileage; consult your GMC dealership to determine if the repair is covered.
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