B0091 Possible Causes
- Faulty Left Front Side Air Bag Satellite Sensor
- Left Front Side Air Bag Satellite Sensor harness is open or shorted
- Left Front Side Air Bag Satellite Sensor circuit poor electrical connection
How do I fix code B0091?
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.Cost of diagnosing the B0091 code
Labor: 1.0
The cost of diagnosing the B0091 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.Possible Symptoms
- Air Bag Warning Light ON
B0091 Meaning
The Restraints Control Module (RCM) monitors all of Supplemental Restraint System (SRS) device connections. If the RCM detects a connection or device connected that is not stored in memory or is not configured for the component, the RCM will set a Diagnostic Trouble Code (DTC) and send a message to the Instrument Panel Cluster (IPC) to illuminate air bag warning indicator.B0091 More Information
Need more information on how to fix the B0091 code?Get Access to Factory Service Manuals
Information for specific makes
- B0091 BUICK Front End Sensor 3 Erratic
- B0091 CADILLAC Front End Sensor 3 Erratic
- B0091 CHEVROLET Front End Sensor 3 Erratic
- B0091 FORD Left Side Restraints Sensor 1
- B0091 GMC Front End Sensor 3 Erratic
- B0091 INFINITI Left Front Side Air Bag Satellite Sensor
- B0091 LINCOLN Left Side Restraints Sensor 1
- B0091 MERCURY Left Side Restraints Sensor 1
- B0091 NISSAN Left Front Side Air Bag Satellite Sensor
Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.