Passenger Side Airbag Circuit Short
The B1998 code indicates a fault in the passenger side airbag circuit, specifically a short to ground or malfunction in the right side airbag inflator circuit. The Supplemental Restraint System (SRS) control module detects abnormal resistance or voltage leakage in the airbag initiator circuit, preventing proper deployment during a collision.
1. Commonly Affected Makes
2. Most Common Causes
- Short to ground in the passenger side airbag wiring
- Corroded, damaged, or loose airbag connector
- Faulty passenger side airbag module
- Defective SRS control module (RCM)
- Damaged clock spring if applicable to the side airbag circuit
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- SRS system inoperative or disabled
4. Step-by-Step Diagnosis
Scan the SRS system for B1998 and any related codes
Visually inspect the passenger side airbag wiring and connectors for damage, corrosion, or loose connections
Test the airbag circuit resistance using a multimeter and compare to manufacturer specifications
Check the clock spring if applicable
If wiring and connectors are okay, replace the passenger side airbag module
If the code persists, test or replace the SRS control module
5. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive because the airbag may not deploy in a crash, increasing the risk of injury. Have the system repaired immediately.
How much does it cost to fix?▼
Repair costs typically range from $200 to $800, depending on whether the issue is a wiring repair, connector replacement, or airbag module replacement.