Nissan Vehicle Key Not Detected and Engine Will Not Start

Nissan Vehicle Key Not Detected and Engine Will Not Start

Refer to the service information for complete key system diagnosis and repair information.

Models: All Nissan vehicles equipped with Intelligent Key or Nissan Anti-Theft System (NATS) key. 

Vehicles use radio frequencies (RF) that are similar to other wireless devices. In the event another wireless device is transmitting at the same time as a key, it can interfere with the signals being received by the BCM. If there is interference with Intelligent Key signals, the following symptoms may occur: 

• The Intelligent Key is not detected causing the engine to not start (no response when the Stop/Start button is pressed)

-“Incorrect Key ID” displayed in the instrument cluster

-“No I-Key Detected” displayed in the instrument cluster. 

• Intermittent operation of the buttons on the remote.

• Intermittent operation of the door request switches. If there is interference with NATS Key signals, the following symptoms may occur: 

• The NATS key is not detected, causing:

– The engine to not start (no response when the key is turned)

– Illumination of the Immobilizer warning light.

– DTCs B2191 (Difference of key) stored in the BCM and P1615 (Difference of key) stored in the ECM. The above symptoms are usually intermittent and can be difficult to diagnose. If a vehicle has experienced the above symptoms, or a customer has reported the above symptoms, if the Immobilizer warning light remains illuminated during attempts to start the engine, this could indicate that the key was not authenticated properly. The supplemental diagnostic items listed should be checked before replacing any parts or performing any repairs. 

• Refer to the service information for complete key system diagnosis and repair information.

If an RFID (Radio Frequency Identification) token is placed within close proximity to the vehicle key, it can interfere with the RF signals, resulting in an inability to authenticate the key and cause a no start concern. 

– Other contributors are: Keys with a similar transponder frequency

– Multiple keys on one keyring 

– Remove all aftermarket devices from the vehicle, including all other keys, while diagnosing a no start concern. 

– Intelligent Key fob battery check the Signal Tech II IKEY Battery Test to confirm the battery state of charge. 

  • Location of Intelligent Key: An Intelligent Key should not be stored where the RF signal can be obstructed by nearby metal objects. This includes purses/back packs with RFID blocking material, which could prevent proper Intelligent Key operation by obstructing the RF signal. 
  • Interference from other personal devices: Confirm the key is not placed in close proximity to phones, other keys, highway PASS Card, USB charger, Personal Computer (PC) charger, etc. that may be transmitting similar RF signals. 
  • NATS keys also contain a transponder that can be affected by interference. 
  • For interference to cause a no start condition, the source of the interference will typically be in close proximity to the key; for example, an RFID chip on a key chain with the key.
  • If the conditions indicated previously are not the cause of the symptoms, check for the presence of an aftermarket alarm system, radar detector or ANY electronic devices, including other keys. 
  • RF signals coming from the vehicle surroundings can interfere with the key signals, such as radar detectors or aftermarket alarm systems in other vehicles or surrounding buildings. 

If you are unable to duplicate the concern, it is important to determine WHERE the vehicle was located when the customer experienced the no start concern.

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