1996 Pontiac Bonneville issue - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-29-2009, 05:47 PM   #11
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Originally Posted by BillBoost37 View Post
While you were burning coolant there is a good change it fouled out your O2 sensor.

The bank 1 sensor 1 (the one that matters) is in the rear exhaust manifold and can be seen by looking down past the strut tower bar.

Many have had bad luck with Bosch O2 sensors. The suggested brands are AC Delco or Denso. Rockauto usually has a rocking deal on the Denso'* and using the club discount code you save even more.
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