What else could be causing this code?

[Silverbird2002]

OK so my car has been throwing a code saying my car is running to lean in both banks. I since have put the MAF screen back on the car and it's still doing it. I took out the MAF sensor and cleaned it real good with MAF cleaner and it's still telling me the car is running to lean. Any thoughts??

[Blizzard242]

Re: What else could be causing this code?

What's the exact code it's giving?

[Silverbird2002]

Re: What else could be causing this code?

p0171 system too lean (bank 1)
p0174 system too lean (bank 2)

[cam98aro]

Re: What else could be causing this code?

http://www.obd-codes.com/p0171

[Slowside]

Re: What else could be causing this code?

I would think O2 sensors. Bank 1 and Bank 2 I think refers to O2.

[cam98aro]

Re: What else could be causing this code?

I would think O2 sensors. Bank 1 and Bank 2 I think refers to O2.

its rare for two o2 sensors to go bad at the same exact time, if anything, it would tell me that the o2 sensors are working, and they are saying the engine isnt getting enough fuel (either maf, or a fuel pressure problem)

[Blizzard242]

Re: What else could be causing this code?

Look for a vacuum leak, even though that would probably be noticeable, just check over your lines, the fpr-map sensor line and brake booster would be most suspect. Check fuel pressure at key on, and running. Give the MAF another careful cleaning. I can't really think of anything else off the top of my head. If you have an oiled filter just installed, you may want to clean it out and redo it with less oil.

[bigbrian442]

Re: What else could be causing this code?

Did you clear the codes after doing your work?

[Blizzard242]

Re: What else could be causing this code?

Did you clear the codes after doing your work?

^^^Good point^^^

[vr4gasm]

Re: What else could be causing this code?

when both codes are thrown its usually an o2 sensor... but unhook your battery and reset your codes see what happens..