B2191 on Nissan: How to Diagnose & Fix
Manufacturer-Specific Body Code (Nissan/Infiniti: Difference of Key / NATS ID Mismatch)
1 Nissan model · 1 documented issue · 1 critical · $800-$1,500 repair
B2191 on Nissan by model: symptoms, diagnosis and fix
A documented no-start condition on push-button-start Rogues can occur when the electronic steering column lock (ESCL/steering lock unit) fails and the vehicle will not transition to READY/ON normally. Owners report the key fob is recognized but the ignition stays stuck, often with a steering lock warning or inability to turn the vehicle on. Nissan issued service information and extended coverage on related steering lock failures across Nissan platforms, and owner complaints/forum reports include Rogue vehicles in this generation.
Common Symptoms
- Vehicle will not start with push button
- Key fob recognized but ignition does not turn on normally
- Steering lock warning or security indicator illuminated
- Intermittent no-start that becomes permanent
- Need to repeatedly press start button before vehicle responds
How to Fix
Diagnosis typically includes confirming battery condition, checking Intelligent Key operation, and scanning BCM/IPDM/steering lock related data for lock status. Repair usually involves replacing the steering lock assembly and performing initialization/reprogramming as required; in some cases the lock is bypassed or a fuse workaround is discussed by owners, but proper repair is replacement and registration of the unit.
Owner tips & cautions
- TipOwners commonly recommend scanning BCM data with a Nissan-capable scan tool to confirm steering lock status before replacing parts.
B2191 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 B2191 mean on a Nissan?
B2191 stands for "Manufacturer-Specific Body Code (Nissan/Infiniti: Difference of Key / NATS ID Mismatch)." B2191 is a manufacturer-specific body code. On Nissan and Infiniti vehicles it generally means 'Difference of Key' — the body control module and the NATS Intelligent Key failed ID verification, so the key the system read does not match a registered key. As a security/anti-theft fault, the immobilizer may prevent the engine from starting or the steering lock from releasing. On other makes the meaning could differ, so confirm against the specific service data. On Nissan it is documented across 1 model: Rogue.
What are the most common causes of B2191?
The most common causes of B2191 are: Unregistered or incorrect key/transponder being used, Faulty Intelligent Key or transponder, Wiring fault between key slot/antenna and BCM, Failed key-slot or antenna amplifier, Body control module (BCM/NATS) fault, Interference or low key battery. The specific cause varies by vehicle.
How much does it cost to fix B2191 on a Nissan?
Published repair estimates on Nissan range from $800 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for B2191 on a different make?
View B2191 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.