My 2010 Cobalt SS/TC has had a MIL on the dash for quite some time. I got HPT the other day expecting to see the Cat efficiency code however was greeted with some others that seem to me to suggest boost leak. however more than that, I am interested to know what the tags (not sure if this is the right term) that HPT places after the codes in brackets. my codes were as follows:
[ECM] P2178 - System Too Rich Off Idle Bank 1 (Old) (Immature)
[ECM] P0101 - Mass Air Flow (MAF) Sensor Performance (Old) (Immature)
[ECM] P0420 - Catalyst System Low Efficiency (SES) (Old) (History) (Current) (Immature)
[ECM] P0106 - Manifold Absolute Pressure (MAP) System Performance (Old) (Immature)
[ECM] P0420 - Catalyst System Low Efficiency
To me this means that the current code causing the SES is the P0420 as it has the (Current) and (SES) tags. and that the other codes may not even be an issue because they are (Old) (Immature), does this mean that it is old data and Immature because it never got bad enough to throw up the engine light?
Any insight into my codes or the tags during diagnostics would be greatly appreciated. I attempted to search the net and these forums but simply found questions and not really any answers. again any help is greatly appreciated.
GM Stage 1
Modern Performance Catted DP