B1483 – Brake Pedal Input Circuit Failure

The ODBII code B1483 indicates a malfunction in the brake pedal input circuit, which may affect the vehicle’s braking system and related safety features.

The severity of ODBII code B1483 is generally considered moderate to severe.

Common Causes For: B1482 Wiper Washer Fluid Level Sensor Circuit Short To Ground

• Faulty brake pedal position sensor
• Damaged wiring or connectors in the brake pedal input circuit
• Corroded or loose electrical connections
• Malfunctioning brake switch
• Short circuit in the brake pedal input circuit
• Open circuit in the brake pedal input circuit
• Faulty engine control module (ECM) or body control module (BCM)

Common misdiagnosis for B1483 Brake Pedal Input Circuit Failure

• Faulty brake pedal switch
• Wiring issues or shorts in the brake pedal circuit
• Malfunctioning ABS module
• Faulty engine control module (ECM)
• Incorrectly calibrated brake pedal position sensor
• Issues with the vehicle’s body control module (BCM)
• Problems with the powertrain control module (PCM)

Common Troubleshooting Steps

The OBD-II code B1483 indicates a “Brake Pedal Input Circuit Failure.” This code typically relates to issues with the brake pedal position sensor or the circuit that connects it to the vehicle’s control module. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Check for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues.
• Inspect the Brake Pedal Position Sensor:
• Locate the brake pedal position sensor, which is usually mounted on or near the brake pedal assembly.
• Check for any visible damage, corrosion, or loose connections at the sensor and its wiring harness.
• Test the Brake Pedal Position Sensor:
• Use a multimeter to test the sensor’s resistance and voltage output according to the manufacturer’s specifications.
• If the readings are outside the specified range, the sensor may need to be replaced.
• Check Wiring and Connectors:
• Inspect the wiring harness for any signs of wear, fraying, or damage.
• Ensure that all connectors are secure and free of corrosion. Clean any corroded connectors with electrical contact cleaner.
• Inspect the Brake Pedal Assembly:
• Ensure that the brake pedal moves freely and is not obstructed.
• Check for any mechanical issues that could affect the sensor’s operation.
• Test the Circuit:
• Use a multimeter to check for continuity in the wiring between the brake pedal position sensor and the vehicle’s control module.
• Look for any shorts to ground or open circuits.
• Check for Ground Issues:
• Ensure that the ground connections related to the brake pedal position sensor are secure and free of corrosion.
• Clear the Codes and Test Drive:
• After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears.
• Consult the Service Manual:
• If the issue persists, refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the brake pedal input circuit.
• Seek Professional Help:
• If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the B1483 code.