B1821 Open in Side Squib Right Circuit

OBD2 Code: B1821

Description: Open in side squib right circuit.

Definition: This code indicates that there is an open circuit detected in the side airbag (squib) on the right side of the vehicle. The airbag control module has identified a fault with the electrical connection or wiring associated with the right-side airbag deployment system, which may prevent it from functioning correctly during a collision.

b1821 – Open in Side Squib Right Circuit

Typical Severity: Moderate

Common Causes

b1821 – Open in Side Squib Right Circuit

Common Causes:

• Faulty side squib (airbag) on the right side
• Wiring or connector issues in the circuit for the right side airbag
• Blown fuse related to the right side airbag system
• Issues with the airbag control module

Common Misdiagnosis

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OBD2 Code: B1821

Description: Open in Side Squib Right Circuit

Common Misdiagnosis: Faulty airbag module, damaged wiring harness, or a malfunctioning clock spring are often misdiagnosed as the cause of this code.

Common Diagnostic Steps

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OBD2 Code: B1821

Description: Open in Side Squib Right Circuit

• Inspect the wiring harness and connectors for any visible damage or corrosion.
• Check for continuity in the side squib right circuit using a multimeter.
• Verify that the airbag control module is functioning correctly by performing a diagnostic scan.
• Examine the side squib (airbag) itself for any signs of damage or malfunction.
• If necessary, replace damaged components such as wiring, connectors, or the airbag unit itself.
• Clear the code and test drive to ensure it does not return.