I have 2003 nissan pathfinder,i have this codes p1610, p1614,the cvar don't start

Hello. Diagnostic code P1611 means you have low voltage at your relay box; code P1610 means someone kept starting that car 5+ times. Good luck and keep me informed; if you want to.

It means that unregistered key used 5 times, BCM or ECM is malfunctioning

To resolve the issue, you can contact the dealer and re-register all chip keys

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.

P1610=Lock Mode--1 turn ignition switch OFF 2 turn ignition switch ON with registered key. (Do not start engine.) Wait 5 seconds. 3 Return the key to off position. 4 Repeat steps 2 and 3 twice ( total of tree cycles). 5 Start the engine. Does engine start ?? Yes...System is OK. Now system is escaped from LOCK MODE...if no start...Go to 3
P1612 is a lot of testing.......get back to me....

my nissan altima 2002 wont start the battery is brand new and code P-1612 was found out what does the code mean

This seems to be a security issue. Do you have any other TRANSPONDER on the key ring ? If so remove them.Also try another key.