NATS Immobilizer & No-start: P1610, P1614 - 2006 Infiniti FX35

If nothing works, you need the dealership with a scan tool computer.

S (Nissan Vehicle Immobilizer System-NATS) has the following immobilizer functions:
Since only NVIS (NATS) ignition keys, whose ID nos. have been registered into the ECM and IMMU of NVIS (NATS), allow the engine to run, operation of a stolen vehicle without a NVIS (NATS) registered key is prevented by NVIS (NATS). That is to say, NVIS (NATS) will immobilize the engine if someone tries to start it without the registered key of NVIS (NATS).
All of the originally supplied ignition key IDs have been NVIS (NATS) registered. If requested by the vehicle owner, a maximum of five key IDs can be registered into the NVIS (NATS) components.
The security indicator lamp blinks when the ignition switch is in "OFF" or "ACC" position. Therefore, NVIS (NATS) warns outsiders that the vehicle is equipped with the system.
When NVIS (NATS) detects trouble, the security indicator lamp lights up while ignition key is in the "ON" position.
NVIS (NATS) trouble diagnoses, system initialization and additional registration for other NVIS (NATS) ignition key IDs must be carried out using CONSULT-II hardware and CONSULT-II NVIS (NATS) software. Regarding the procedures for NVIS (NATS) initialization and NVIS (NATS) ignition key ID registration, refer to CONSULT-II OPERATION MANUAL IVIS/NVIS.
When servicing a malfunction of the NVIS (indicated by lighting up of Security Indicator Lamp) or registering another NVIS ignition key ID no., it is necessary to re-register original key identification. Therefore, be sure to receive ALL KEYS from vehicle owner. System Composition NIEL0174 The immobilizer function of the NVIS (NATS) consists of the following:
NVIS (NATS) ignition key
NVIS (NATS) immobilizer control unit (IMMU) located in the ignition key cylinder
ECM
Security indicator lamp.

ANTI-THEFT SYSTEM ! Did you change KEY'S

A P1610 Code has to do with the NATS system which is the security system in your car. If you look at your key there is a small blue square in it which contains a chip. This chip sends a signal to your immobilizer in your steering column and then to the Electric Control Module. If the ECM does not recognize the ID of the key then it will prevent it from starting.
Try resetting the ECM to get it to start and take it to the dealer. With luck all they have to do is re-program the keys to your ECM again. Worst case scenario, your ECM is toasted and you will need to get a new one. Good Luck!

all of my research keeps coming back to p1610 for the P16ff Code but I am not sure.
The code P1610 is a problem with the NATS, or better known as system of vehicle immobilizer. And this arose out of the following:
-are using a q-key is not registered or not transmitting the code
- BCM or ECM are evil, and
now is in "locked mode"
you can do something quick:
1. Confirms the code q yields
2. EXIT THE LOCKED MODE. If the code is p1610 continues with the following with a copy of the vehicle key:
(1) -Place the switch to OFF
(2) -Place the switch in ON with the key registered(do not start the engine). Wait 5 seconds
(3) -Returns the switch to the off position. Wait 5 seconds
(4) -Repeat step 2 and 3 two more times (being a total of 3 times) (
5) -Starts the engine
with this test and write us if t worked. If this is not the case there will be q enter to detail by checking with the diagnostic charts and other things.
The other code does not exist or does not comply with the structure of a code

P1610 is a resulting DTC from the "LOCK MODE" condition which is set for various NATS malfunctions or an improper key being used. It prevents the car from starting (for some period of time, even if the key issue is rectified).To reset a NATS lock mode, a proper key must be cycled three times again to get the car to start

In regards to the 1614 code. You should/could also see code 1610.

P1610/P1614
P1610- Ignition key/engine control module (ECM) malfunction
P1614- Immobilizer control module (ATS) coding plug communication-no signal. (ATS=anti theft system)
The ECM is getting a signal form 1614 that the key/ignition is not providing a correct code. Hence, the programing is told to fail engine start. Should the engine failing to start with 1 key, try the other key.
Should the Anti Theft System go into lock mode with one key, try the second key. If that does not unlock it then do this: with either key turn the ignition to ON position for 5 seconds then BACK to OFF position for 5 seconds, the to On position for 5 seconds then back to the OFF position for 5 seconds. If the ignition key is and intergrated key (remote: unlock, lock) the batteries should be changed in both keys. Low battery or dead battery provides low or no security code signals to ECM -- hence incorrect or no signal.
When replacing the batteries: be sitting in the drivers seat with the 2 keys within 24 inches of each other. And make the battery change within 1 minute for each key and within 4 minutes of the first key.
If that does not work,Check you users manual for the ignition key sequence on/off series to relearn the on board car computer to the keys.

please check the attached picture

Not sure what the problem here is.
The codes are for the security system - - the key is not sending a signal or the right signal for the car to start.
Could be a problem with the lock cylinder which may have a sensor for the key inside it.

these are codes for the anti theft system.did you use a key to start it other than one you usually use?if im not mistaken p1610 is a difference of key/unregistered key and 1614 means system entered lockout mode because of key.please let me know how you make out.