OBD Guide
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B1286

Servo Motor Potentiometer Air Intake Left Circuit Short To Battery

B1286 is an OBD-II diagnostic trouble code meaning: Servo Motor Potentiometer Air Intake Left Circuit Short To Battery. Common causes: short circuit in wiring harness, air intake servomotor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Unstable engine idling
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Short circuit in wiring harness
  • Air intake servomotor malfunction
  • Potentiometer damage
  • Contact corrosion
  • Mechanical damage to components

How to Fix

  1. Check the wiring harness for damage and short circuits.
  2. Measure the resistance of the servomotor potentiometer
  3. Check the operation of the air intake servomotor
  4. Replace damaged components (if necessary)
  5. Clean contacts from corrosion
  6. Reset the error and check the system operation

Related codes

B1285B1287P2004P2005

FAQ

What does the B1286 code mean?

B1286 is an OBD-II diagnostic trouble code that indicates: Servo Motor Potentiometer Air Intake Left Circuit Short To Battery

What causes a B1286 error code?

The most common causes of B1286 include: Short circuit in wiring harness; Air intake servomotor malfunction; Potentiometer damage; Contact corrosion.

How do I fix a B1286 diagnostic trouble code?

To fix B1286: Check the wiring harness for damage and short circuits.. Measure the resistance of the servomotor potentiometer. Check the operation of the air intake servomotor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1286?

Limited driving only, diagnose soon

How much does it cost to fix B1286?

The estimated repair cost for B1286 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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