Question about 1997 GMC Yukon
I have a 97 GMC with a 5.7 about 60000 on engine rebuild. Getting chk engine light. catalyst threshold bank 2
Check this info: TEXT/O2_Sensor.html
Generally, this replacement part solve the problem.
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Posted on Feb 24, 2012
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Posted on Jan 02, 2017
You have it right Avalanche.
Bank 1 is normally the one with the #1 cylinder side.
So Bank 1 sensor 1 is the first one downstream, bank 1 sensor 2 is the one after the catalytic converter.
Posted on Nov 20, 2009
Testimonial: "Thank you for the answer so quickly."
behind the converter on the passenger side the furthest from the engine
Posted on Feb 25, 2010
Testimonial: "Thanks for the speedy response. The only think that would make it even better if you sent me a diagram of the location. This a great free service. "
More than likely bank 1 sensor has a possible vacuum leak, or a lean misfire on that side of the bank.(lean misfire happens when gap of spark plug are exceed due to wear), As for the 02 sensor I agree that it is reporting the true engine condition on that side of the bank
Posted on May 01, 2011
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