OBD Guide
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B1820

Short in Side Squib Right Circuit

B1820 is an OBD-II diagnostic trouble code meaning: Short in Side Squib Right Circuit. Common causes: wiring harness damage, right side curtain air squib malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Error B1820 in scan tool memory
  • The side curtain airbags may not deploy in a crash.

Causes

  • Wiring harness damage
  • Right side curtain air squib malfunction
  • Problems in the airbag module
  • Short circuit in the circuit

How to Fix

  1. Check the integrity of the wiring harness
  2. Measure the resistance of the squib
  3. Check contacts and connections
  4. Scan the airbag module for errors
  5. Replace faulty components

Related codes

B1810B1825B1830

FAQ

What does the B1820 code mean?

B1820 is an OBD-II diagnostic trouble code that indicates: Short in Side Squib Right Circuit

What causes a B1820 error code?

The most common causes of B1820 include: Wiring harness damage; Right side curtain air squib malfunction; Problems in the airbag module; Short circuit in the circuit.

How do I fix a B1820 diagnostic trouble code?

To fix B1820: Check the integrity of the wiring harness. Measure the resistance of the squib. Check contacts and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1820?

Do not drive — repair immediately

How much does it cost to fix B1820?

The estimated repair cost for B1820 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat