Sounds like either a bad MAF or intake air leak. A common problem on a 12 yr old car and usually a cheap fix. Because both banks of O2 sensors are reporting the same thing it is unlikely failed O2 sensors. Here is more discussion on this:
P1123, P1128 CEL Codes - RennTech.org Forums
__________________
2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
|