Whenever it gets to this time of the year, my driver side rear sensor goes crazy and stays on every now and then. It's always flashing orange/red. Told the dealer last year when my truck went in for service/lock replacement but because they could not replicate did, they did nothing. Is there any easy DIY fix?

 

I'd take a look at the connector. Unplug, spray the contacts with contact cleaner, fill connector full of dielectric grease, plug back in.