I am getting an intermittent 2H code when hitting bumps. I thought it was a loose connection somewhere but everything i looked at is tight and has good readings. 2 months ago I was getting this code upon turning left or right. I replaced the wiring harness and speed sensor and everything was fine for about 2 months. Now i am getting this code again. It does not code out all the time it is infrequent. I have tested everything on the I-19, I am getting rpm readings on the display, and all connections tested good as described in the book.

I am at a loss here. Any ideas?