I've noticed some xtra gas consumption too and my check engine light is on. What could that be. I was thinkin O2 sensor but my engine isn't revving funny.

 

yes def. check the O2 sensor... and also check your oil cause if its ****ty it could be a cause of the mass gas consumption (or at least it was in my old civic... but that was a honda so who knows)

 

My car has the check engine light ,actually both of them and I think its the o2 sensor on yes they would eat gas ,especially my automatic one ,I did a full tune up in both of them ,gas mileage when up like maybe 3-4 mpg and is about 22city/26hw mpg so when I get the change Im gonna have to put a new one on it coz this gas sucking shiat sucks lol but oh well I still love my car.

 

Are bad O2 sensor's common on these cars? This is my first Nissan and I know every Manuf has their defects. Honda's are prone to bad lifters, V6 models are prone to bad head gaskets and trannys.

 

Well considering the fact that both of my 240 has the same problem then I guess a defect but I think its on most Nissans though,My B11 Nissan Sentra did this after 100,000 miles so I guess that the sensor life is between 100,000 or 110,000 miles or so,anybody knows?

 

you have an injector leak. check your oil to see if you smell gas in it if so injector leak or injector is not seated properly

 

if the car is running fine its probably not an injector leak. I had that before and it made the car run bad. But that was just me : )

 

why dont you diagnost the car and see why is the check engine light on... it must be on for a reason.

my guess is that its on because of the O2 sensor.

 

Idea....pull the whole ka out.....put whole SR in....lol. Problem solved.



Ps...I'm a ka fan.....hence the JOKE...

 

rivneo1 :To answer your question an O2 Sensor is good for 30,000 miles . At 9,000 miles that O2 sensor works at only half of it's potential , so pretty much they go out quick . I would change mine every tune-up or every 4 oil changes ( That's if you change it ever 3k miles )


Also check to be sure you have no fuel leaks . Do you smell any gas out the engine bay ? Smell any from the exhaust ?

 

hmm..this problem sounds oddly familiar..lol i think i have the same thing too...its running around 109k miles..i filled up full and had to refill again after 230 miles...which i think is around 13 mpg also...only thing i have in the car is an injen intake and apexi n1 exhaust...i recently bought it and the spark plugs and fluids have been changed..no check engine light comes up though. it may need an oil change and a tune-up though..so when i do that ill let ya know if it makes a difference..

p.s. i can literally see the gas gauge move if i take rpms up to like 6000 lol

 

Although this is an old thread I will post what has happened recently.... I posted this thread about a week after I bought the car...it's now been about 7-8months. Gas mileage hasn't gone up at all. I've changed every fluid there is, done another tune up, found that two injectors were leaking (got that fixed) patched the hole in my intake. It turns out that things seem to be worse now My car idles extremely rough (whole car shakes like mad) No dummy lights are on tho. And to top it all off, i'm still getting horrible gas mileage.

Anyone looking to buy a 240 in Ontario? lol

 

O2 Sensor.. try that i got the same ****ty gas mileage and since i work at nissan as a tech.. i plugged in a scanner and i got an 02 code so im in the process of changing it.. good luck with the car....

 

anyone else ever have a problem where sometimes when u start the engine, if u dont rev it a bit the engine dies?