I lost the keys to Suzuki Swift 2001. Inow have a key from Suzuki but it needs coding its a expens I cannot afrd as the garage is 30miles away and transporting the car is prohibative

look next to seat edge or glove box.
or read opr guide?
google for it>?
or
https://suzukipitstopplus.com/Category/5-suzuki-owners-manuals.aspx

$4 to read it. any time, or buy it,for next time lost.

backup to your other post same.

not start, so, car cranks, ok and will not start, , RIGHT?
That code is from a real scan tool???????
which engine is there, of the 5 or so?
1.2 L I4 (petrol)
1.3 L M13A I4 (petrol)
1.5 L M15A I4 (petrol)
1.6 L M16A I4 (petrol)
1.3 L I4 (diesel)
in what country is car, (1million posts here and not one ever said that)
and varies by guess what?, COUNTRY.

P1610 (is power train code =p)
i have no books on non USA cars. nor access to them
so not saying COUNTRY , forces me to guess engine and codes.
so i did what you failed to do , i searched on FIXya forum
and found this.
my best guess , would be... as per below. (no real FSM)
I see only 1 , a Reno. wrong car, but my online source shows no usa swift data at all. 2011
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
we only have 2001
here
https://suzukipitstopplus.com/Products/1173-2001-swift-service-manual.aspx

sorry

my car 2010 suzuki swift smart key youtube

timing belt snapped by the sound of it

your car is fitted with imoblizer unit.
take the key to the dealership and sign that with your car

check battery in fob may be bad or weak and notify a dealer for ur code setting should not have lost it battery may be new doesnt mean its not defective

suzuki swift central locking does not operate when using remote key fob

you can buy replacement key fobs/need to be programed. w/getting new key it also has to be set to transponders frequency owners manual takes you through procedure