OBD Guide
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B1812

Short To Ground In Driver Side Squib 2nd Step Circuit

B1812 is an OBD-II diagnostic trouble code meaning: Short To Ground In Driver Side Squib 2nd Step Circuit. Common causes: damage to the airbag wiring harness, second stage squib malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • SRS system does not pass self-diagnosis
  • Possible problems with the operation of seat belt pretensioners

Causes

  • Damage to the airbag wiring harness
  • Second stage squib malfunction
  • Short circuit in the circuit
  • Problems with the SRS control unit
  • Contact corrosion

How to Fix

  1. Diagnose the SRS system
  2. Check the integrity of the wiring harness
  3. Inspect contacts and connectors
  4. Check squib resistance
  5. Replace damaged components if necessary
  6. Reset the error and check the system

Related codes

B1811B1813B1000

FAQ

What does the B1812 code mean?

B1812 is an OBD-II diagnostic trouble code that indicates: Short To Ground In Driver Side Squib 2nd Step Circuit

What causes a B1812 error code?

The most common causes of B1812 include: Damage to the airbag wiring harness; Second stage squib malfunction; Short circuit in the circuit; Problems with the SRS control unit.

How do I fix a B1812 diagnostic trouble code?

To fix B1812: Diagnose the SRS system. Check the integrity of the wiring harness. Inspect contacts and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1812?

Do not drive — repair immediately

How much does it cost to fix B1812?

The estimated repair cost for B1812 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat