P0171 code

[HappyHooligan]

I got that code last week, bought some Maf cleaner, stripped one of the screws but was able to clean it in the box as best I could. It didn't look dirty though. I replaced the upstream o2 sensor last year on the 43 code and it seemed to fix that. Is vacuum leaks my next move? Where all do I check for those? if that doesn't do it, I'll probably have to bring it to have the professional figure it out.

 

[haro]

I had this code for about 2 month and replacing parts like maf sensor, bank 1 coil, valve cover gasket, intake gasket and what fix it was the o2 sensor=bank 1 sensor 2. which I had replace about 3 years ago

 

[idiot]

No offence, but this doesn't make any sense. P0171 means that the engine is either getting too much air or not enough fuel. A loose gas cap would throw an Evap code, not a Lean code. If you cleared the code then it might not necessarily come back right away. How long ago did this happen?


Good luck!

Last year my 02 threw the same code. Replaced the gas cap and cleared the code. Hasn't come back since

 

[sugjavier]

Replacing this resolved my 0171 code...:cowboy:

Is this the vacuum hose that goes to the throttle body?

Air Cleaner Hose #2
Part Number: 17882-62020

Edit: Yes it is. My p0171 hasn't come back yet.

But I'm about to revive another thread cuz I'm getting p01130 even though I already replaced the air fuel sensor..

 

[Stickma2]

P0171

01 4wd SR5 6cyl 200k miles. New plugs in fall.
Threw code until winter, then it stopped.
No code all winter. Now giving code again, May above 50 degrees.
Cleaned MAF & throttle body. Checked for vacuum leak w/ carb cleaner spray method. Keep turning off code. Comes back after about 200 miles each time.
I know it could be many things. What should I check next?