book shows nothing???
i saw it on my scan gage 2 and cleared it.
did not come back??...help!!

 

If it does not return, do not sweat it, it is a false glitch, there is no b2aaa code. It may be that your PCM misread the real code. Personally, I think it was just a voltage irregularity, but if it come back, or you start seeing another code, let us know.

Is your battery fresh?

 

tnx doc. batt is good, got "ugly" solid brass conn!
ill watch it. that was my first so i got concerned.

 

recheck sg2 showed previous code po455 that points to evap// gas cap,,i hope. ill watch it and check cap seal.
any other?

 

*MYSTERY CODE* B2AAA ???? help identify... - Chevrolet Colorado & GMC Canyon Forum

B2AAA code (actually P0420) - Diesel Place : Chevrolet and GMC Diesel Truck Forums

Read post #5 here
Mystery Code: B2AAA - Chevy HHR Network