06 Cobalt LT - 126,xxx.
On and off over the last two years of ownership, I've occasionally gotten P2128 and P2138 trouble codes, more often than not going over an extreme bump / pothole. car goes into limp mode and (usually) the code can be cleared and can get back on the road.
I recall seeing a couple of threads indicating that a possible cause is corrosion on ground points. I'm wondering if anyone has a list of possible ground points to check out (pictures would be great), and in particular how to get at the ground below the drivers seat? That's one I've seen mentioned but not yet tackled.
2006 Cobalt LT