Nissan Sentra does not recognize any Scaner

Hello, you must check first that the check engines is working well. Open the swich the light must turn on to cvomprobar that the focus is not molten.If the focus on the engine starts and the light must be turned off. If the electronic system is possibly turned off the electronic system is fine.

Do not despair, the failures are that complicated and you must check step by step, I ask you if you are doing it and if you have the necessary tool. Czech:
1 Compression Dbe above 90 psi
2 empty with a vacuomether must give 14 in.

You should check the electrical system since a single cut or peeled cable can cause you many problems check that you are not losing current due to a disconnected mass cable

Greetings Friend, in some vehicles such as the Ford Explorer share or have a fuse to energize the scanner interface (I remember it is 7.5amp), since it happened to me that trying to scan a 2002 did not recognize the interface, read the manual and a fuse dedicated to it appears, check and it was melted, when I immediately changed the interface recognized the vehicle, check in the manual of your nissan. similar. The other thing you can do is measure the voltage levels of each PIN of the OBD connector, in some pins 12v, earth, possibly 5V, all vary according to the brand and protocol. Greetings and luck.

Look, the same thing happened to me and it came out that it was the MAF sensor and this did not register it and therefore did not appear in the Scaner and deduct that it did not record it because the failure is in the milli-seconds and does not reach the record code.