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^^^ What he said.. where did the parts come from, I want to know about the plug wires, too. Make sure those are properly fastened.

In the FSM there is a list of all the fault codes the computer can trip with information on each (how to fix, how fault is detected.) Reviewing this information will help you narrow the problem down - you can eliminate many conditions because all but one possible error was NOT logged.


Plugs are NGK dual electrode as spec'd by the manual. Wires are Toyota. Everything worked fantastically from tune up until today with the trailer, and from the time I detached the trailer (put about 45 miles on since then). The only thing that "changed" is the attachment of the trailer and actual utilization of the brake controller. Nothing else has change, prior or since, the issue occurred.

Brian K. Gallus
I have nothing important to say.