Engine Performance problem
2000 Pontiac Montana 6 cyl Front Wheel Drive Automatic 116, 00 miles
A year ago, code 0131 (O2 sensor low volts bank 1 sensor 1) and 0137 (. Bank 1 sensor 2)appeared intermittently. I had rear O2 sensor replaced. Both codes returned a couple of months later. I got a Scanguage to read and clear them. They re-appear every few weeks. Ive been clearing and ignoring them. They usually appear upon moderate acceleration from a parkway toll booth. No engine symptoms at all.
Just got codes 0131, 0137, and 1404 (EGR valve pintel stuck open) upon leaving a toll booth. They cleared OK. Still no engine symptoms, it runs fine.
All codes related? Is this a necessary fix - by replacing EGR and front O2. Something else going on?
have the same problem?
Friday, March 27th, 2009 AT 3:40 PM