Trouble codes PO131 & PO151 banks 1&2 O2 sensors #1 keep setting a trouble code while hwy driving. Also sets pending codes for the #2 O2 sensors on both banks. I replaced both #1 sensors w/ new OE sensors but codes still come on with heavy accelaration on hwy. Also seems to lack power unless under full throttle. Can you help me with a diagnosis? This is a 2002 chevy avalanche 4x4 w/5.3 liter. It was also recently setting a code for the MAF but I cleaned it and the code has not returned.
Wednesday, February 23rd, 2011 AT 11:06 PM