c1220 brake pressure sensor supply voltage circuit high
C1220 Brake Pressure Sensor Supply Voltage Circuit High
OBD2 Code: C1220
Description: Brake Pressure Sensor Supply Voltage Circuit High
Definition: This code indicates that the brake pressure sensor is receiving a higher than normal voltage supply, which could be due to issues such as wiring problems, a faulty sensor, or an issue with the vehicle’s electronic control unit (ECU).
C1220 – Brake Pressure Sensor Supply Voltage Circuit High
Typical Severity: Moderate
Common Causes
C1220 – Brake Pressure Sensor Supply Voltage Circuit High
Common Causes:
- Faulty brake pressure sensor
- Short circuit in the wiring harness
- Corrosion or poor connection at the brake pressure sensor connector
- Faulty ABS module
- Issues with the power supply to the brake pressure sensor
Common Misdiagnosis
OBD2 Code: C1220
Description: Brake Pressure Sensor Supply Voltage Circuit High
Common Misdiagnosis: Replacing the brake pressure sensor without checking for wiring issues or a faulty power supply to the sensor.
Common Diagnostic Steps
OBD2 Code: C1220
Description: Brake Pressure Sensor Supply Voltage Circuit High
Common Diagnostic Steps:
- Verify the code using an OBD-II scanner and clear it to see if it returns.
- Inspect the brake pressure sensor for any visible damage or corrosion.
- Check the wiring and connectors related to the brake pressure sensor for signs of wear, damage, or disconnection.
- Measure the voltage supply at the brake pressure sensor connector using a multimeter. Ensure it is within manufacturer specifications.
- Inspect and test the vehicle’s battery and charging system to ensure proper voltage levels are maintained.
- If applicable, check for any blown fuses related to the brake system circuit.
- Consult technical service bulletins (TSBs) for known issues related to this code on your specific vehicle model.
- If all checks pass but the issue persists, consider replacing the brake pressure sensor with a new one from a reputable source.