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1998 Chevrolet S-10 P1133 OBD 2 code

Tiny
JASON GHORMLEY
  • MEMBER
  • 1998 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 281,344 MILES
Got a p133 code O2 sensor, insufficient switching. Hooked up a scan tool to look at the o2 sensors and saw that the sensors are switching back and forth. So I replaced all of the exhaust gaskets along with the gasket in between the head and header and the heated o2.I also hooked up a vacuum gauge to find no engine leaks and no other leaks found this code has been on for a wile now and I tried to clear the code after I worked on it and it still is coming on what do I do next
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Monday, January 6th, 2014 AT 12:03 PM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Sounds like a lazy o2 sensor you will still see it switching on a scan tool but the computer sees its not switching fast enough. So most likely you have a bad o2 sensor.
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Monday, January 6th, 2014 AT 12:20 PM
Tiny
MAXIMILIAM
  • ADMIN
  • 436 POSTS
Thank's for the info will that fix a high idle?

Jason ghormley
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Tuesday, January 7th, 2014 AT 4:31 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
I really doubt that you could have a vacuum leak causing the high idle. Fix the o2 sensor code and go from there.
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Tuesday, January 7th, 2014 AT 7:48 AM

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