po141 on 2003 GMC Sonoma

m.i.l. light is on. code scanned po141. Replaced o2 sens. cleared obc. came back on. same code. never ran the ethanol fuel in it. Could my cat.convert. be full o trash? I have to hit the key switch once, turn off, then turn it over to start. i put a fuel pump in it less than a year. engine idle surges @ start also. runs like a terd!?!?

by in Devine, TX on June 20, 2010
0 answers
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the service eng. light comes on and stays.trouble code is po141 oxygen sensor ,bank 1 sensor 2.all oxygen sensors have been changed twice.