OBD Guide
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B2345

Seat Switch Reference Voltage Negative Common Open Circuit

B2345 is an OBD-II diagnostic trouble code meaning: Seat Switch Reference Voltage Negative Common Open Circuit. Common causes: open common reference voltage wire, oxidation of contacts in connectors. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Errors in the passive safety system
  • Passenger weight sensors do not work
  • Incorrect operation of the electric seat drive

Causes

  • Open common reference voltage wire
  • Oxidation of contacts in connectors
  • Wiring harness damage
  • SRS control unit malfunction
  • Short circuit in the sensor circuit

How to Fix

  1. Check the integrity of the wires in the harness to the seat sensors
  2. Inspect and clean the contacts in the connectors
  3. Check the condition of the SRS system fuses
  4. Diagnose the airbag control unit
  5. Replace damaged sections of the wiring harness

Related codes

B0100B1342B1650

FAQ

What does the B2345 code mean?

B2345 is an OBD-II diagnostic trouble code that indicates: Seat Switch Reference Voltage Negative Common Open Circuit

What causes a B2345 error code?

The most common causes of B2345 include: Open common reference voltage wire; Oxidation of contacts in connectors; Wiring harness damage; SRS control unit malfunction.

How do I fix a B2345 diagnostic trouble code?

To fix B2345: Check the integrity of the wires in the harness to the seat sensors. Inspect and clean the contacts in the connectors. Check the condition of the SRS system fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2345?

Do not drive — repair immediately

How much does it cost to fix B2345?

The estimated repair cost for B2345 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat