Passenger Airbag Circuit Malfunction B1997
Diagnostic trouble code B1997 indicates a fault in the passenger-side airbag deployment circuit or side impact sensor. The Restraints Control Module (RCM) has detected an out-of-range resistance, voltage, or signal in the passenger seat belt pretensioner, front airbag, or side impact sensor circuit, causing the Supplemental Restraint System (SRS) to be disabled for that occupant.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged wiring or connector in the passenger airbag circuit
- Faulty passenger airbag module (open or short circuit)
- Defective passenger side impact sensor
- Damaged passenger-side clockspring (if applicable)
- Malfunctioning Occupant Classification System (OCS)
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- SRS system disabled for the passenger side
4. Step-by-Step Diagnosis
Scan the vehicle for all stored codes and note freeze frame data.
Visually inspect the passenger airbag wiring and connectors for damage, corrosion, or loose connections.
Test the passenger airbag module resistance using a multimeter and compare to manufacturer specifications.
Check the passenger side impact sensor and its circuit for proper operation.
Inspect the clockspring (if applicable) for continuity and damage.
If all components check out, test the RCM for proper function or replace if necessary.
5. Frequently Asked Questions
Is it safe to drive?▼
No, it is not safe to drive. The passenger airbag and related restraints are disabled, increasing the risk of injury in a crash. Have the vehicle towed to a repair facility.
How much does it cost to fix?▼
Repair costs typically range from $200 to $1,200 depending on the root cause. A faulty airbag module or sensor can be $300–$800, plus labor. RCM replacement may exceed $1,000.