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Did not plug in harness. Does not need it to detect trailer. Trailer is detected with parking sensors.

I had the warning lights come on. I checked all wiring connections but the ones you can get to without ripping the while grill apart were fine. I manually rotated the shutter several times open and closed. Turned truck back on and warning had cleared. Been good for several weeks now.

Toyota finally responded and said the trailer had to be reattached to get computer to reset. I tried it but didn’t work. What did work was driving forward and backward with trailer attached until truck asked if trailer was attached. I chose “no” and the system turned off the trailer detection...

Took truck in to dealer. After 3 days in the shop they said Toyota knows of this problem with the auto trailer detection system but doesn’t have a fix. They said it could be several months or more before a fix is found. Truck was returned to me unfixed and many safety functions still inoperable...

Towed trailer with TRD OR with towing package. The truck has the auto trailer detection system when you plug in the trailer or if it detects one with the sensors. When this happens the system turns off several safety systems. Problem is that my truck still says the trailer is detected after...