Check engine light on and idling rough
P0171 CHEVROLET - Fuel Trim System Lean Bank 1 https://www.autocodes.com/p0171_chevrolet.html
P1101 - Mass Air Flow Sensor Out of Self-Test Range https://www.autocodes.com/p1101.html
P0171 is a lean condition on the oxygen sensor from the side of the engine that is the same side as cylinder 1. The other p1101 is an air flow issue that is most likely a vacuum leak that is causing the 171 error. Check all the vacuum lines on the engine and see if any are loose and also see if there is any damage to the PCV valve from the battery leaking.
SOURCE: 2003 Silverado rough idle, idles good after "check engine" light
Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.
SOURCE: Rough idle
I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.
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my daughter has a 2011 chevy cruze and this is the 4th time in a month that she has had the p1101 code come up we have replaced the mass air flow sensor and the throttle body and the manifold and the cover also replaced the pcv pipe and the brake pipe.. what else could be causing this issue??
http://www.iatn.net/forums/13/53406/p110...
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