PSM Problem: yellow/orange dash flashing at mild turns?

[deepraver]

PSM light is showing on very mild/slow turns, both in right and left directions. It causes a weird driving condition when its flickering, loss of power, feels like sputtering. All seems fine if if I turn PSM off. 

 

Any suggestions?

 

Is this a bad sensor(s)? If so, where is it?  

 

I had a a P2189 Lean Bank 2 at Idle, and I replaced the MAF, checked the fuel pumps (all good) and (mechanic) smoked the system. Found leak when smoked cold at a variable timing cam gasket (replaced). No leak now except tiny amount from left turbo.   That code seems gone now and nothing else seems to be relevant to PSM. 

 

[mihaipopa]

Worn or non-matching tires would be my first guess

[deepraver]

No recent tire change and plenty of tread... I just had it doing it pretty band and it was even rough driving going straight. I turn the PSM off and no issue. 

[mihaipopa]

Are all tires the same size? Have you checked for variance in pressure and thread depth?

A faulty angle steering sensor would most likely throw a code.