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ceyl · 10-14-2012, 11:38 PM

Need some help. I've got a 2004 Yukon, 5.3 that I get a check engine light during cold weather. I've replaced the MAF, both O2's and the fuel filter. During warm weather I have no issues. As soon as it gets to 30-40 degrees the light comes on. The codes are left and right bank lean, and MAF failure. Any ideas?

10-14-2012, 11:38 PM	#1
ceyl Drives: 2012 2SS/RS M6 Join Date: Apr 2012 Location: Colorado Posts: 36	Check Engine Light Need some help. I've got a 2004 Yukon, 5.3 that I get a check engine light during cold weather. I've replaced the MAF, both O2's and the fuel filter. During warm weather I have no issues. As soon as it gets to 30-40 degrees the light comes on. The codes are left and right bank lean, and MAF failure. Any ideas? __________________ SLP TVS 2300, Kooks Long Tubes, Magnaflow 3" comp, BAP, Rotofab CAI, RX catch can, valve cover breather and 3.4" SC Pulley.