Had the same CEL, VSC OFF, TRAC OFF and the solution was a loose gas cap. It didn’t go away on its own after I replaced the gas cap. However once I cleared the CEL with OBD II scan reader everything everything is back to normal. So check the easy stuff first like a loose gas cap.
Do you have all the hardware (bolts, washers) required for installation? Which components do the skid plates protect?
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I was in the same boat you are in for the last few years sticking with XREAS + FJ coil and Daystar Spacers. The ride was bumpy and bouncy and in the last few months got worse. I finally check the vehicle and notice a bad leak in the rear shock so I replaced all four XREAS shocks with Bilstein...
The V8 and after market hitch will allow you to use a weight distribution hitch that will level the tow vehicle as more tongue weight is applied to the hitch. This will distribute the weight to the front tires for better vehicle control. Plus if you add the sway bars this will provide sway...
Suggest you replace the V6 hitch with an after market hitch that bolts to the frame. Also suggest adding a weight distribution hitch for sway control and add an after market tranny cooler. Then if you are towing in the mountain passes install a scan guage to monitor the auto tranny temp. That's...