SOURCE: need to diagnose 1998 nissan 4wd evap leaks codes
PO400 has to do with the egr valve. Valve could be leaking
SOURCE: had emissions test on '95 nissan 200sx. No check
hi try changing the spark plugs and air filter, these help immensely with the burning of fuel, also ( i don't know what you have in the US ) but use some redX to clean your injectors, this will also help....hope this helps
SOURCE: manufactures code p1440 emissions
The P1440 code is for a small EVAP leak. Your gas cap being loose is a common EVAP problem. If not that, the EVAP canister is also well known for developing small cracks.
SOURCE: 1996 nissan 200sx asm emissions are high
I don't know about you, but, my 97 sx se got a clogged catalytic converter and they honed in out rather than replace it...my gas milage went up to 41 mpg, but the emissions...well..you know..might have cat checked
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