Service Engine Soon light

neveucd

Mine gets similar codes all the time, and usually it's the O2 sensors faulting. The dealer will replace them under warranty in most cases, unless they are shady and try to blame your HFC. The light will go off and stay off for a while, but has always come on again later on as temperatures vary. I've had the secondary and primary sensors changed at least 4 or 5 times already. I've learned to ignore it when it comes on now, and it goes away after a 1000 miles or so. I usually get the CEL when it's hot as hell outside. I think it's the F.I. HFC's or my uprev tune causing it.

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GTM Stg. 2 TT||F.I. CF 18" Res. CBE||GTM 3" Downpipe ||Injen Cold Water Intakes||UpRev||Work Gnosis GS2||Hankook||Tein Monoflex||Hawk||Seibon||Aero Jacket||

scottIN

Last night I cleaned my MAFs. Thy looked ok, but I assume that even a slight film would cause a problem. Also cleaned my K & N's and made sure they weren't putting out any excess oil. Also looked for exhaust leaks and checked the intakes & everything looked good. Haven't reset the codes yet, but I did do a 10 mile highway drive this morning and mileage seems normal - about 28 MPG. I'll get my code reader on Monday and clear them and see if they come back.

scottIN

Just an update. Stopped by the dealer on Friday and they cleared my codes and said that it may not have been anything since it threw both banks at once, but wasn't uncommon to see them with HFCs. So far, they haven't come back.

dawudih

Funny story, since it became cold here in Houston, <70 F, I found a mouse nest in my 4runners airbox. This caused my cel light to come on, maf dirty from paper element.

zchristopher

thousand oaks nissan just replaced my o2 sensor last month under warranty. i would try the same