B1675: Driver Seat OCS Short to Ground
The B1675 code indicates that the driver's seat Occupant Classification System (OCS) module has detected a short to ground in the input circuit that determines whether the seat is occupied. This circuit typically includes a pressure sensor or switch located in the seat cushion, and its resistance or voltage signal has dropped outside the expected range toward 0V, interpreted as a short to ground. The OCS is critical for airbag deployment decisions, as it enables or suppresses passenger airbag inflation based on occupant detection.
1. Commonly Affected Makes
2. Most Common Causes
- Faulty seat pressure sensor or switch
- Damaged or chafed wiring in the seat harness shorting to ground
- Corroded or loose connector at the OCS module or seat sensor
- Internal failure of the OCS module
3. Symptoms You Will Notice
- Airbag warning light illuminated on the dashboard
- Possible deactivation of the passenger airbag system
4. Step-by-Step Diagnosis
Scan for codes and verify B1675 is present
Inspect the seat wiring harness for damage, chafing, or pinched wires
Check the seat sensor connector for corrosion, bent pins, or poor contact
Measure resistance or voltage at the sensor circuit to confirm short to ground
Test the seat pressure sensor or switch per manufacturer specifications
If wiring and sensor are okay, suspect a faulty OCS module
5. Frequently Asked Questions
Is it safe to drive?▼
Driving is possible but not recommended because the airbag system may be compromised, increasing injury risk in a crash. Have the issue diagnosed promptly.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the fix involves wiring repair, sensor replacement, or OCS module replacement.