Question

I have a 2000 Nissan Sentra GXE 1.8L with codes P0720, P0455 and P1448 what it could be?

Answer 1

P1448 start by checking for damage EVAP canister or hoses. If no hoses are damage the EVAP canister vent control valve may have to be replaced.

P0455 start by checking/replacing the gas cap

P0720 Nissan - Vehicle Speed Sensor
You can remove and the Vehicle Speed Sensor and see if it is dirty, if it is clean it with brake cleaner if the sensor gears are damaged replace the sensor

P0455 NISSAN - EVAP Control System Gross Leak Detected
Read more: https://www.autocodes.com/p0455_nissan.html

P0720 NISSAN - Vehicle Speed Sensor
Read more: https://www.autocodes.com/p0720_nissan.html

P1448 NISSAN - EVAP Canister Vent Control Valve Open
Read more: https://www.autocodes.com/p1448_nissan.html