04 Tahoe Running Lean
Posted 08 January 2011 - 12:43 AM
Posted 08 January 2011 - 12:52 AM
That said, what can cause a lean condition? Too little fuel, ie fuel or regulator malfunctioning, or too much air, ie, vacuum leak.
Posted 08 January 2011 - 10:02 AM
Posted 08 January 2011 - 02:09 PM
I would clear the codes but they would come back after a while. Sometimes they would clear themselves but would be stored. I finally took the vehicle to a local vehicle electronics shop to have them diagnose the problem. When I explained that they were intermittent, the technician said the problem was either a bad connection in an O2 sensor connector, bad insulation on a O2 wire, or water getting into the wring loom at times causing a slight voltage change.
As the CEL was not on at the time, he said to be careful while running through water and washing the car so that lots of water didn't get sprayed up under the car. He said if the codes returned to bring it back and he would try to track done the exact cause. I followed his advice and the codes haven't returned for three months and 3000 miles of driving.
Edited by frupp, 08 January 2011 - 02:10 PM.
2004 Suburban 1500 LT, 5.3L, 135,000 miles, Stabilitrak, Sunroof, Flex fuel, 3.73 rear axle, tow package.