SOURCE: 2003 Nissan Altima 2.5S, Check Engine Light Problem.
this problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.
SOURCE: 2005 Nissan Altima cuts off while driving.
Dear Tajack73: Nissan had a voluntary recall campaign on the 2002,2005,2006 Altima's with the 2.5 litre engines It envolves reprogramming the ECM.
The campaign ID # RD0712 NHTSA #: 07V-527
2005 Altima Vin's 1N4AL11**5C 100003-957025
1N4AL11**5N 400000-934180
The symptom you have described fits the one they have describe in the bulletin. Check with Nissan and see if your car falls within the campaign. Let men know how you do.
SOURCE: Idling low when stopped at a stop light. Almost stalls.
It certainly could be vacuum leaks. Check all your mounting bolts on the intake manifold, as well as all vacuum hoses. Make sure they aren't loose and are in good condition. Use a stethoscope, or a lenght of fuel hose held against your ear to listen for vacuum leaks while the engine is running. A hissing sound will be heard. Be sure and wiggle them if you can, while you're checking. A soapy water solution will also detect leaks.
It could also be the EGR valve leaking, or a plugged PCV valve. Or your timing belt could have jumped again. Let me know how you make out. Good luck!
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