C0455- steering wheel angle sensor performance
GM has issued a service bulletin PI0639C to address a service stability message and trouble codes C0710 and C0455
ricksfreeautorepairadvice.com
C0161- Anti-lock Break System, break switch circuit
If you can see these CXXXX Codes on your scanner...it is probably High End one like a “GYMKO” Tech 2 or an Autel Scanner. As such you can perform an ABS Actuation Test as per the videos available in the “Stickyed” Tech 2- Additional Tech 2 Resources Thread...BUT FIRST… You must perform a proper Brake Bleed that flushes the crap out of all the lines and the Master Brake Cylinder:
Tech 2 ABS Brake Bleed Procedures:
P0506- idle air control system revolutions per min. Lower than expected.
P1400- cold start emission reduction control system.
Work the P0506 Problem first...and the P1400 Code will probably go away. Pursue a Good Cleaning by First removing the Throttle Body from the Intake Manifold and using a Non-Destructive Cleaning Solvent that will not invade and damage the TB-IAC Internal Gear Controls. Go EZ with excessive pressure when using your fingers to apply pressure to the Butterfly TB Plate. Clean and align the Plastic Grommet Gasket and go EZ on tightening down the (4) TB to IM Bolts .
From a Famous 'Wu-Tang Clan GMTN Guru'…
@MAY03LT on How to Perform a THOROUGH Throttle Body Cleaning: