got the ses light , pulled codes p0141,p0161 and p1133

1999 CHEVROLET SUBURBAN
164,000 MILES
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ONCEA3FAN
  • MEMBER
  • 1 POST
99gmc suburban 5.7 350 2wd auto.
trans was rebuilt about 4k miles ago. no problems til now

what the chance all o2 sensors went bad together.
can't find any blown fuses, or bad connections.
Jan 5, 2012 at 9:55 AM
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DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Suspect wiring problem check to see if O2 wiring harness is on exhaust and burnt grounding causing codes
Jan 5, 2012 at 10:09 AM
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