Running rich

I have an 01 Camaro Z28 with a custom tune from 2005ish. She is now throwing a P0172 code. I have not done any adjustments to the tune since I had it made for me. Where do I start and what to do????

Thanks, Alex

[mikel]

if the tune hasnt changed and the code came out of the blue, something on the car has changed, check O2s, exhaust, etc.

The P0172 code did just start. I have also had a P0430 code for the past year or so. So, possibly an O2 sensor that needs to be checked? She does smell very potent in the exaust though....

[mikel]

whatever it is, its a passenger side issue
Likely O2, yes.

Thanks for your input and quick response, Mike!

**UPDATE**

She began throwing additional codes pertaining to O2 sensors. I started tinkering and cleaning. Since it was running rich, I believed the problem was in the intake. I went to the MAF sensor in the intake tube and found it was covered in goop and grime. Cleaned the sensors off and the codes never came back. My smog check passed with flying colors!

[garrett]

awesome!