part no. 8946735060 $244. Need help please. This is causing a check engine lite to come on and no reset of the computer is working. I'm told it regulates gas/air at startup when the engine is cold. I'm also told it cost $130 to install. Ouch. and with only 47K miles I'm not reall happy about it. bty it's an O2 V6 dbl cab prerunner. If I can find it and confirm it's the real cause I'll change it myself if it's not to difficult. Any comments?