OBD Guide

B1D18

Passenger Mirror Horizontal Position Sensor Input Circuit Low

B1D18 is an OBD-II diagnostic trouble code meaning: Passenger Mirror Horizontal Position Sensor Input Circuit Low. Common causes: open or short circuit in wiring harness, poor contact in the sensor connector. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the automatic adjustment of the passenger mirror
  • Mirror does not save position in memory
  • The mirror moves jerkily or does not respond to commands

Causes

  • Open or short circuit in wiring harness
  • Poor contact in the sensor connector
  • Mirror position sensor malfunction
  • Problems with the mirror control module

How to Fix

  1. Check the integrity of the wiring harness to the mirror
  2. Clean the contacts in the sensor and control module connectors
  3. Check the resistance of the position sensor
  4. If necessary, replace the sensor or control module

Related codes

FAQ

What does the B1D18 code mean?

B1D18 is an OBD-II diagnostic trouble code that indicates: Passenger Mirror Horizontal Position Sensor Input Circuit Low

What causes a B1D18 error code?

The most common causes of B1D18 include: Open or short circuit in wiring harness; Poor contact in the sensor connector; Mirror position sensor malfunction; Problems with the mirror control module.

How do I fix a B1D18 diagnostic trouble code?

To fix B1D18: Check the integrity of the wiring harness to the mirror. Clean the contacts in the sensor and control module connectors. Check the resistance of the position sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1D18?

Limited driving only, diagnose soon

How much does it cost to fix B1D18?

The estimated repair cost for B1D18 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat