2003 Silverado Z71 176000 miles 5.3 liter
I have a random pop up check engine light accompanied by a PO 446 code followed by this symbol $10 If I reset the code from my reader it goes away and will vary from one to five days before returning. It also went away for a week when I disconnected the battery for some other work. Doesn't seem to affect engine performance, power, gas mileage, starting or anything that I can tell but I'm getting ready to drive across country to California and would like to clear this up. I tried a couple of easy suggestions like changing the gas tank cap, but nothing so far works except to reset the code. Looking for folks with similar problems and what you did to correct. I'm pretty handy with car repair but just don't have much experience in this area. As always, all ideas appreciated.
Bill M
I have a random pop up check engine light accompanied by a PO 446 code followed by this symbol $10 If I reset the code from my reader it goes away and will vary from one to five days before returning. It also went away for a week when I disconnected the battery for some other work. Doesn't seem to affect engine performance, power, gas mileage, starting or anything that I can tell but I'm getting ready to drive across country to California and would like to clear this up. I tried a couple of easy suggestions like changing the gas tank cap, but nothing so far works except to reset the code. Looking for folks with similar problems and what you did to correct. I'm pretty handy with car repair but just don't have much experience in this area. As always, all ideas appreciated.
Bill M
