17544 - System too Lean Code. WTF ?

[Elberoth]

I just got the following code:

17544 - Fuel Trim: Bank 1 (Add): System too Lean
P1136 - 001 - Upper Limit Exceeded

I logged for long term fuel trims (Block 032) and 1st field is 6,4% and the 2nd one -18,8% (negative).


Any ideas what may have happened ?

Vaccum leak ? Fuel pump ?

I have recently installed TP (got code for that, too), TIP and a new MAF.

Car feels normal.

[old guy]

Code P1136 is usually associated with an air leak somewhere in the intake system. Check for vacuum hose leaks or leaks around the intake manifold. Take a real close look at the 1/8" hose coming out of the end of the intake. More often than not that is the problem.

[EBG 18T]

i throw the same codes occasionally. But it is only when i am at full throttle and over 9500' elevation in the mtns. I am thinking my issue is altitude related. It never happens around town or at lower elevation.

When you find out what is causing your issues update this post.

[Elberoth]

Thanks guys. I think I will check the vac lines first.

I will update this thread when I solve this problem.

[DenverNoob]

3rd or whatever on the vac lines...esp. the one running out of your intake manifold...the 2002-2003 use a braided cloth covered line versus a solid rubber one...and they often crack because of the funny angle they hit the manifold at coupled with the fact that they are cut dreadfully short.