OBD Guide
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B2148

Outside Rearview Mirror Position Sensor Input Voltage Low

B2148 is an OBD-II diagnostic trouble code meaning: Outside Rearview Mirror Position Sensor Input Voltage Low. Common causes: open or short circuit in wiring harness, mirror position sensor malfunction. 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 rear view mirror
  • Mirror does not move when trying to adjust
  • The malfunction indicator on the instrument panel lights up

Causes

  • Open or short circuit in wiring harness
  • Mirror position sensor malfunction
  • Problems with the mirror control unit
  • Corrosion of contacts or connectors

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the voltage at the position sensor
  3. Replace position sensor if necessary
  4. Check and clean connector contacts

Related codes

B2147B2149

FAQ

What does the B2148 code mean?

B2148 is an OBD-II diagnostic trouble code that indicates: Outside Rearview Mirror Position Sensor Input Voltage Low

What causes a B2148 error code?

The most common causes of B2148 include: Open or short circuit in wiring harness; Mirror position sensor malfunction; Problems with the mirror control unit; Corrosion of contacts or connectors.

How do I fix a B2148 diagnostic trouble code?

To fix B2148: Check the integrity of the wiring harness. Check the voltage at the position sensor. Replace position sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2148?

Limited driving only, diagnose soon

How much does it cost to fix B2148?

The estimated repair cost for B2148 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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