B2191 on Nissan
Manufacturer-Specific Body Code (Nissan/Infiniti: Difference of Key / NATS ID Mismatch)
B2191 on Nissan vehicles indicates manufacturer-specific body code (nissan/infiniti: difference of key / nats id mismatch). Au7o has documented this code across 1 Nissan model — most commonly on Rogue. 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. Typical repair costs on Nissan range from $800 to $1,500, depending on the specific model and root cause.
Common Causes of B2191
- •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
B2191 on Nissan by Model
Nissan Rogue(1 issue)
- Steering Column Lock / Electronic Steering Lock Failure Causing No-Start2008-2013
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.
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View B2191 across all makes →Frequently Asked Questions
What does B2191 mean on 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 specifically, this code is documented across 1 model.
What causes B2191 on Nissan vehicles?▼
Common causes on Nissan: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B2191 on a Nissan?▼
Repair costs on Nissan range from $800 to $1,500, depending on the specific model and root cause.
Which Nissan models have B2191 documented?▼
Au7o has documented B2191 on 1 Nissan model: Rogue.