02 Nissan Sentra S-ER shutting off after start up

Question

after replacing my clutch in my 02 Nissan sentra, my car was having problems starting and when I finally got it started it keeps dying. these codes appear 1612 507 420 113

Answer 1

P1612 is related to a key issue

have you tried a different key? its possible the computer lost memory of the key and may need to be reprogrammed 

 

Possible causes

- Faulty or not programmed ignition key

- Faulty IMMU

- Faulty Engine Control Module (ECM)