0741 & 0744 lean codes

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Jul 21, 2007 | 12:12 PM

DShira

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Joined: Oct 2003

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From: South Jordan Utah

0741 & 0744 lean codes

Im getting lean diag codes for both banks on my 2003 V10 with 37000 miles.
Can anyone tell me what could be causing them??
I checked vaccum lines for bad connections or cracks.
I had a K&N filter but have since gone back to the stock filter setup.
Appreciate and ideas..

Jul 21, 2007 | 02:13 PM

captchas

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From: north west new jersey

p0741 is for your torque convertor clutch and p0744is also for the convertor. sorry guy but it's time for a rebuild. the convertor is gone and most likely has sent pieces though out the trans and pluged up the cooler at the same time.

check out our web site www.level10power.net and click on codes and that shows what you need for the repair.

Jul 21, 2007 | 05:58 PM

DShira

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Joined: Oct 2003

Posts: 101

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From: South Jordan Utah

Well I transposed the numbers. -- its codes p0171 and p0174 Sorry -
Can you give any advice??

Jul 21, 2007 | 09:12 PM

broncobilly66

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mine did the same thing a while back....it was the PSV elbow on top of the intake it was rotten....had a hole the size of my little finger in it . u gotta take the TB cover off to see it

Jul 21, 2007 | 09:13 PM

keith w

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Joined: Apr 2001

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Both banks lean, I'd be checking for a vacuum leak first. Sounds like unmetered air is entering the engine

Edit: And as broncobilly suggests, the PCV would be a good place to start.

Last edited by keith w; Jul 21, 2007 at 09:16 PM.