Engine code b2aaa - Ion Saturn Cars & Trucks

buy a manual an look it up. Your going to need the diagnostic steps any way . $20 some bucks for repair info for a year .
http://www.alldatadiy.com

Where is this code coming from PCM/ECM - engine computer , BCM - body control module , radio ? What are you using to pull this code ?

This is not a valid code. You will find lots of hits online where people are reporting this code. It seems that the consumer grade scanning tools are not able to read the code correctly. I recommend taking it into the dealer and have them read the code.

TRY TO RE SET AND SEE WHAT HAPPEN ,NO MUCH INFO.

This is a rheostat. It wears out. You should replace the TPS.

Code is nothing it is actually P0420. Catalyst efficiency under par. Check you don't have any mud or dirt built up on the downstream 02 sensor. Hope it helps.

Where an how did you come up with it ? Scan tool used , what module etc.....

i have download picture but not seen

You must have a code reader that is CAN enabled. CTSs as early as '04 require a CAN enabled reader. the 06 cts uses a CAN OBD-II CODE READER/EOBD SCANNER. When buying the scan or code reader for your vehicle, make sure it supports the Controller Area Network (CAN) protocol. CALL THE DEALER OR AUTO-ZONE MAY BE ABLE TO TELL YOU THE PROPER NAMED SCANNER TO USE. GOOD-DAY !

Im not sure what the b2aaa is but the p0171 is bank one ( line of cylinder's that has #1 cylinder in it) is lean. This can just be a bad oxygen sensor.
I need to know more. Is the idle smooth? Is the idle at a good speed? (motor not reeving or going to slow)