Its in the engine bay in your fuse/relay box.
chain
10w 30
Check your engine. Check your fluid levels and add if needed.
P0125: insufficient coolant temperature for closed loop fuel control you need an ECT sensor engine coolant temperature
First fix the problem that caused the light to come on. Then you may be able to reset it by removing the battery cable for 5 minutes. If that does not work, you will need an OBD2 scan tool to reset the light.
Check the motor mounts
BY getting an Honda all your problem will go away Aman.
The 1996 Nissan 240 fuel pump is located on the front side of the fuel tank. You will need to get beneath the vehicle in order to view the fuel pump.
you can get it from a junkyard for like 5 bucks, any 240sx window motor will work. dont go to a dealer because I went and they tried to charge $100.
On the engine block behind the radiator. If the car is AT then just behind the ATF check stick. Byron
The computer has detected a problem with the emissions system. Have it repaired before it becomes serious.