Shouldn't that be too much if it is a lean condition? And also, in the "HOw do I know if it's a MAF sensor problem?" section, you say to do the "truth test" with the engine idling. My scanner does not give baro, but kpa (atmospheris pr.) and with key on,engine off, I get a fairly accurate reading. With the engine running, I get a very different reading, as I would expect. What am I not understanding here, or is there a mistake in the article? Should the engine be idling for this test? Thanks.
"BASICS" section. You said that the o2 sensor is detecting too little O2. on 2001 GMC Yukon
by bowls-royce in Brunswick, GA on July 17, 2013