OBD Guide
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B2043

Fall Of Positive Voltage

B2043 is an OBD-II diagnostic trouble code meaning: Fall Of Positive Voltage. Common causes: damage to the srs wiring harness, poor contact in connectors. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Airbag light is on
  • Restraint system inactive
  • Errors in other vehicle systems

Causes

  • Damage to the SRS wiring harness
  • Poor contact in connectors
  • SRS module malfunction
  • Low voltage in the on-board network
  • Short circuit in the circuit

How to Fix

  1. Check battery voltage
  2. Inspect the SRS wiring harness for damage.
  3. Check that all connectors are securely connected
  4. Scan the SRS system for additional errors
  5. If necessary, replace the SRS module

Related codes

B1000B1025B1030

FAQ

What does the B2043 code mean?

B2043 is an OBD-II diagnostic trouble code that indicates: Fall Of Positive Voltage

What causes a B2043 error code?

The most common causes of B2043 include: Damage to the SRS wiring harness; Poor contact in connectors; SRS module malfunction; Low voltage in the on-board network.

How do I fix a B2043 diagnostic trouble code?

To fix B2043: Check battery voltage. Inspect the SRS wiring harness for damage.. Check that all connectors are securely connected. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2043?

Do not drive — repair immediately

How much does it cost to fix B2043?

The estimated repair cost for B2043 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat