OBD Guide
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B2348

Mirror Switch Reference Voltage Positive Common Supply Voltage Fault

B2348 is an OBD-II diagnostic trouble code meaning: Mirror Switch Reference Voltage Positive Common Supply Voltage Fault. Common causes: open or short circuit in wiring harness, oxidation of switch contacts. Estimated repair cost: $22–89.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Power mirrors don't work
  • Fault indicator flashing
  • Intermittent mirror operation

Causes

  • Open or short circuit in wiring harness
  • Oxidation of switch contacts
  • Mirror switch malfunction
  • Problems with the control unit

How to Fix

  1. Check the integrity of the wiring harness to the switch
  2. Clean switch contacts
  3. Check voltage at switch
  4. Replace switch if necessary
  5. Check the operation of the control unit

Related codes

B2347B2349U0155

FAQ

What does the B2348 code mean?

B2348 is an OBD-II diagnostic trouble code that indicates: Mirror Switch Reference Voltage Positive Common Supply Voltage Fault

What causes a B2348 error code?

The most common causes of B2348 include: Open or short circuit in wiring harness; Oxidation of switch contacts; Mirror switch malfunction; Problems with the control unit.

How do I fix a B2348 diagnostic trouble code?

To fix B2348: Check the integrity of the wiring harness to the switch. Clean switch contacts. Check voltage at switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2348?

Limited driving only, diagnose soon

How much does it cost to fix B2348?

The estimated repair cost for B2348 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat