Passenger Airbag Pressure Switch Circuit Failure
The B1926 code indicates a fault in the passenger pressure switch circuit, which monitors occupant weight or presence to determine if the front airbag should deploy. The Restraints Control Module (RCM) detects an electrical anomaly such as a short to ground, short to voltage, or open circuit. As a safety measure, the system disables the passenger airbag and illuminates the airbag warning light.
1. Commonly Affected Makes
2. Most Common Causes
- Damaged passenger seat pressure sensor
- Short circuit or open circuit in sensor wiring
- Loose or corroded electrical connections under the seat
- Incorrect weight sensor calibration after service
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- Passenger airbag deactivated (may show 'Passenger Airbag Off' indicator)
4. Step-by-Step Diagnosis
Scan for codes and verify B1926 is present
Inspect wiring and connectors under the passenger seat for damage, corrosion, or looseness
Test the pressure sensor resistance and voltage according to manufacturer specifications
Check for any previous repairs or modifications that may have affected calibration
If wiring and sensor are okay, test the RCM or perform a sensor recalibration
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible, but the passenger airbag will be disabled, increasing injury risk in a collision. Have it repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the sensor, wiring, or RCM needs replacement.