B0100 on Jeep: How to Diagnose & Fix
Electronic Frontal Sensor 1 Malfunction
1 Jeep model · 1 documented issue · 1 critical
B0100 on Jeep by model: symptoms, diagnosis and fix
Multiple safety recalls affect the Grand Wagoneer airbag system. Recall 21V-873: The Occupant Restraint Controller (ORC) may have incorrect software that disables driver, passenger, and knee airbags. Recall 23V-545: The upper B-pillar interior trim may not be fully seated and could interfere with side curtain airbag deployment. Both issues prevent airbags from deploying properly in a crash.
Common Symptoms
- Airbag warning light on dashboard
- Service airbag system message
- Loose or improperly seated B-pillar trim
- No visible symptoms (software defect)
How to Fix
Contact dealer immediately for both recalls. Recall 21V-873: Dealer will update the ORC module software at no cost. Recall 23V-545: Dealer will inspect and properly reseat the B-pillar trim, replacing if necessary, at no cost. Both repairs are covered under safety recall. Check VIN at recalls.mopar.com.
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Owner tips & cautions
- WarningThese are critical safety recalls - airbags may not deploy in a crash. Schedule dealer visit immediately even if no warning lights are present
- TipCheck your VIN at recalls.mopar.com for both recall numbers (21V-873 and 23V-545)
- TipCheck NHTSA.gov for active recalls — repairs are performed free at authorized dealers
Sources for this issue (2)
B0100 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does B0100 mean on a Jeep?
B0100 stands for "Electronic Frontal Sensor 1 Malfunction." This is a body code in the airbag (SRS) system indicating a malfunction with electronic frontal impact sensor 1, one of the crash sensors that detects a frontal collision and tells the airbag controller when to deploy. The system runs a self-check on these sensors and their wiring, and when sensor 1 fails to communicate properly, reads out of range, or shows a circuit fault, this code sets and usually lights the airbag warning lamp. Because it affects crash protection, the airbags or seatbelt pretensioners may not deploy as designed until it's fixed. It generally points to a faulty sensor, its wiring/connector, or the airbag control module. On Jeep it is documented across 1 model: Grand Wagoneer.
What are the most common causes of B0100?
The most common causes of B0100 are: Faulty frontal impact (crash) sensor, Damaged, open, or shorted sensor wiring, Corroded or unseated sensor connector, Connector damage from a prior collision or repair, Poor ground or power supply to the sensor, Faulty airbag (SRS) control module. The specific cause varies by vehicle.
How much does it cost to fix B0100 on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
Looking for B0100 on a different make?
View B0100 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.