Cat or O2 sensors bad? - Chevy Traverse Forum: Chevrolet Traverse Forum
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post #1 of 3 (permalink) Old 11-06-2019, 05:16 AM Thread Starter
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Cat or O2 sensors bad?

I have a 2009 Traverse with 140k on the odometer.

It throws 0420 and randomly 0300 codes.

Check engine light came and I checked for codes and deleted them. 2 Days nothing. Then we started a 1000 mile roadtrip and there was everything ok.
Yesterday I drove hom from work and a short time after start (2 miles approx) Check engine light appears again. Deleted the failure code and until now nothing happend.

Does it make sense to change the O2 sensors or is one of the catalytic converters going bad? Need your experience.

Many thanks from Germany

Diesel is offline  
post #2 of 3 (permalink) Old 11-07-2019, 11:41 AM Thread Starter
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Quick Qustion. Are Up- and Downstream O2 Sensors are the same?
Diesel is offline  
post #3 of 3 (permalink) Old 11-07-2019, 12:05 PM
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Join Date: Nov 2008
Posts: 10,951
No they are not-
they are different.

I replaced mine at 100,000. Just because of mileage. They were still working fine.
back in 2015- this is what I found for the sensors on the 2010...

double check part #s-- as they may be different for 2009

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 88,000
2010 Traverse 3.6L- 153,000
2003 Trailblazer 4.2L- 181,500
rbarrios is offline  

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