| All About OBDII Engine Codes
AutoCodes - Generic - B1821

B1821 Code - Open in Side Squib Right Circuit

- Code Popularity: 24,751 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By - Updated Nov 29, 2022
Share on Facebook   Share on Twitter   Share on Linkedin

|Code B1821 Possible Causes

  • Faulty Front Seat Airbag Assembly Right (RH) (Front Side Squib Right)
  • Front Seat Airbag Assembly Right harness is open or shorted
  • Front Seat Airbag Assembly Right circuit poor electrical connection
  • Faulty Center Airbag Sensor Assembly

|How do I Fix the Code B1821?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code B1821?

Labor: 1.0

The cost of diagnosing the B1821 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code B1821 Possible Symptoms?

  • Air Bag Warning Light ON

|Code B1821 Description

The Front Side Squib Right (RH) circuit consists of the Center Airbag Sensor Assembly and Front Seat Airbag Assembly Right (RH). This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the front side squib RH circuit.

OBDII Code B1821 - Open in Side Squib Right Circuit -
B1821 Code - Open in Side Squib Right Circuit

|Need More Information on the B1821 Code?

Need more information on how to fix the B1821 code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the B1821 Code?

Get the B1821 code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

|Code B1821 comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the B1821 code? Have you replaced any parts?
Any information is appreciated. Thanks