Ok so my SES light came on.

Went to autozone to have it read, "Catalyst efficiency low-bank 2." Guy at autozone said I might need to change the catalytic converter. What do you guys think? anyone know where I can get one cheap?

Another problem....
"ECM power supply circuit- Back up RAM malfuntion" ??????

 

never had these problems but curious, so... bump

 

Does it have anything to do with an exhaust mod

 

some cat codes call for you to reprogram the ecm. its a situation based fix. it might not be much help or maybe common knowledge around here ive only been a member for a month.
possiable causes
three way cat
exhaust tube
intake air leaks
fuel injectors
fuel injector leak
spark plugs
improper ignition timing
if i werent so dumb i would post a picture i clicked the insert picture but i didnt show...i also didnt search to find out how
this is all for p0420 code soory if it doesnt help.

 

Hmmm...well the code that I got was P0430. Don't know if it's a big difference. I haven't done any mods either.

Ok found the paper with possible causes
1. catalytic converter defective (failure possibly doe to #2, 3, or 4)
2. Engine misfire or running condition
3 large vacuum leak
4. engine oil leakage into exhaust valve guide seals, piston rings.

 

P420 is bank 1
P430 is bank 2
some converters are covered 8 years 80,000 miles
if you give me your vin number i can check nissan.net for for information

http://www.motoralldata.com/alldata/...8411/132235432

i dont know if that link will work for you

 

Eh, my car is a Salvage title, don't think it would work. But hey, I did reset the ECU yesterday and passed emissions today..

 

good to hear