Codes 1171, 0137, 0157 SOLVED

[Jolly Roger VX'er]

I had the same problem discussed here and scanned the very same codes:

I checked for unmetered air via loose connections, examined EGR for leaks, replaced air temperature sensor grommet, replaced Throttle Body Gasket with new one, and replaced fuel filter. I also reinstalled the factory airbox/filter to eliminate any possible issues with my carbon fiber cold air intake/cone filter.

so I then attacked it by going right for the jugular and pulled off the SC and replaced the intake gaskets myself even though they were replaced earlier (about 1 yr ago) when SC was first installed by my dealer for $720.00

After removing gaskets I saw nothing wrong with them but installed new ones just the same. I did find some cut 'o'-rings on some of the injectors and replaced them with new ones (used plenty of lube and TLC!). I found 1 "cracked" fuel injector where the plastic outer shell or shroud (kind of resembles a spark plug boot) seats against injector hole in intake. I really thought this was the culpret! Replaced with new fuel injector ($125 w/tax)

After resetting ECM and test driving the problem still existed and seemed to be happening more frequently and I began noticing lack of power and it stalled once. Check engine light would come on at either steady highway speed or when going up a hill and putting foot into it. GRRRRRRR.

I finally decided I'd change the MAF Sensor and if that didn't do anything I'd proceed to the O2 sensors next. Well, a few minutes work changing the MAF sensor fixed the problem! I got a rebuilt O.E.M. MAF from Advance Auto for $98 plus $35 core charge. Kind of wish I'd started there first ;but, the cut o-rings and cracked injector probably would have caused problems down the road!

At any rate....I'm surprised I never got a code referring to the MAF system...just the three codes listed in this thread which is why I didn't swap it out earlier!