Customer: Hello, My name is ***** ***** I'm reading the 2003 Tahoe O2 sensor thread. My check engine
light is on and it is throwing 4 codes. I will check the fuses tonight after work.
JA: Thanks. Can you give me any more details about your issue?
Customer: I was having "Reduce Engine Power" issues and the mechanic replaced the computer. Didn't end up being the problem, I watched a youtube video and fixed the rear engine ground in my driveway which solved the problem. Upon the replacement of the computer the Tahoe was throwing all 4 O2 codes (Will post them after work) and the mechanic said it was just coincidence. However, he had the entire fuse block tore apart trying to fix the "Higher than normal voltage issue" that he said was the computer. In summary, I believe that he had something to do with the sensors and it may be the fuse or something did not get hooked back up. Thanks for the help!
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Chevy Experts (you only pay if satisfied). There are a couple customers ahead of you. We can help you for less if you're not in a rush. Are you willing to wait a bit?
Customer: Sure. I will not be able to check on the codes or fuses until after work.
JA: OK. Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.