B1285 Servo Motor Potentiometer Air Intake Left Circuit Open

OBD2 Code: B1285

Description: Servo Motor Potentiometer Air Intake Left Circuit Open

Definition: This code indicates that there is an open circuit in the servo motor potentiometer for the air intake on the left side. The potentiometer is responsible for providing feedback to the vehicle’s control module about the position of the air intake servo motor, and an open circuit means that this feedback loop is interrupted.

B1285 – Servo Motor Potentiometer Air Intake Left Circuit Open

Typical Severity: Moderate

Common Causes

b1285 – Servo Motor Potentiometer Air Intake Left Circuit Open

Common causes:

• Faulty servo motor potentiometer
• Open or short circuit in the wiring for the left air intake servo motor potentiometer
• Loose or poor electrical connection related to the left air intake servo motor potentiometer circuit
• Defective engine control module (ECM)

Common Misdiagnosis

OBD2 Code: B1285

Description: Servo Motor Potentiometer Air Intake Left Circuit Open

Common Misdiagnosis: Replacing the servo motor without checking for wiring issues or connector problems.

Common Diagnostic Steps

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OBD2 Code: B1285

Description: Servo Motor Potentiometer Air Intake Left Circuit Open

• Check for any blown fuses related to the air intake system.
• Inspect the wiring and connectors for damage or corrosion in the circuit of the left air intake servo motor potentiometer.
• Test the servo motor potentiometer for proper operation using a multimeter.
• Examine the control module for any signs of malfunction or failure.
• Verify that there is no obstruction in the air intake path affecting the servo motor’s movement.
• If necessary, replace faulty components such as wiring, connectors, or the servo motor itself.
• Clear codes and test drive to ensure that the issue has been resolved and does not reoccur.