Check engine light turns off while wheeling (1 Viewer)

[Rusty Marlin]

Comes back ON, on pavment....
I guess it's time to find the broken wire in the #1 O2 heater circut.

Or just spend more time wheeling... She seems to like it.

 

[flintknapper]

Could be an intermittent ground issue with the bulb socket at the dash.

I've got a few that either flicker or go off when I am on a bumpy road.

 

[Rusty Marlin]

The OBDII reader tells me its the #1 O2 heater circut. I thought it was the plug so replaced O2 sencor's plug and the truck side harness plug. But that didn't take care of it.
When the light goes off there are no active codes.
It could be a chaffed wire on the heater circut, but I don't blow any fuses; so I'm more inclined to think it's a broken wire or corroded connector closer to the ECU.
It has been like this for a couple years and my level of concern is approaching zero, but it's time to hunt it down when I get a nice weekend.