Warning lights

[jsbihn]

Hey all,
I am curious what is going on here and what can be the fix....
I have two warning lights come on - the traction control light and the ABS.
BUT! it is not a continuous code.
I run the my ELM 327 scanner when the lights are on and there is no codes (ok, I know HumTech told me the 327 doesnt scan that deep)
AND once the rig is shut off and then turned back on the light go away.

Plus it only seems to turn the lights on when I hit a bump hard, or drop off an incline kinda hard. Normal roading and what-not... doesnt cause anything.

What do you think?