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HOW TO FIX TROUBLE CODE P1133

Tiny
ALSMILEZ
  • MEMBER
  • 1999 CHEVROLET BLAZER
The check engine light is on with code P1133
Thursday, October 20th, 2011 AT 10:32 PM

4 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
This code is because the engine is misfiring or has a large vacuum leak here are two guides to help fix it.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please run down these guides and report back.
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Thursday, October 27th, 2011 AT 12:27 PM
Tiny
KISSAB16
  • MEMBER
  • 1 POST
Thank you for this post I followed the guides and found #3 cylinder had a cracked spark plug so I did a full tune up and cleared the codes all fixed! I love this site.
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Tuesday, June 11th, 2019 AT 12:24 PM
Tiny
SABERS24
  • MEMBER
  • 1 POST
  • 1995 CHEVROLET BLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 15,000 MILES
Poup the code p1133 and we dont know what it means.
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Tuesday, June 11th, 2019 AT 12:24 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
That is a code for the bank 1 heated oxygen sensor isn't responding. Either you have a wiring issue, a bad connection, or the sensor is bad.
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Tuesday, June 11th, 2019 AT 12:24 PM (Merged)

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