Troubleshooting my ’09 Tahoe

My Tahoe is starting to show its age or mileage. I’m somewhere around 220,000 miles now. The check engine light came on a little while ago and I’ve reset it several times. It keeps coming back. Using my OBD2 reader today has added a code.

codes read by Chevrosys through my VeePeak adapter

The P0175 is new today and gives me more to look at. One of my first steps will be to point this out to the tahoeyukon forum because there are a lot of great people there.

I forgot to update this post. After replacing the oxygen sensors (first using cheap Chinese sensors) I got this mostly fixed. Now the cheap set failed miserably and made things worse. Then I bought AC Delco units and they worked but the cheap Chinese ones appear to have damaged one of my catalytic converters. Did I save money? Yeah, no.