Passenger Seat Side Air Bag Deployment Loop
Table of contents
B0021 SATURN Possible Causes
- Faulty Passenger Seat Side Air Bag
- Passenger Seat Side Air Bag harness is open or shorted
- Passenger Seat Side Air Bag circuit poor electrical connection
- Faulty Sensing and Diagnostic Module (SDM)
How do I fix code B0021 SATURN?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- DTC B0021 01: Passenger Seat Side Air Bag Deployment Loop Short to Battery
- DTC B0021 02: Passenger Seat Side Air Bag Deployment Loop Short to Ground
- DTC B0021 04: Passenger Seat Side Air Bag Deployment Loop Open Circuit
- DTC B0021 0D: Passenger Seat Side Air Bag Deployment Loop Resistance Above Threshold
- DTC B0021 0E: Passenger Seat Side Air Bag Deployment Loop Resistance Below Threshold
Cost of diagnosing the B0021 SATURN code
The cost of diagnosing the B0021 SATURN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Air Bag Warning Light ON
B0021 SATURN Description
If a malfunction is detected, a Diagnostic Trouble Code (DTC) will be stored in non-volatile memory. During a side or frontal crash of sufficient force the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the passenger seat side air bag. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar is used within the passenger seat side air bag connector which will short together both high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.
