Disclosed herein are techniques for implementing vehicle ECU reprograming, so the ECU programming, which plays a large role in vehicle performance characteristics, is tailored to current operational requirements, which may be different than the operational characteristics selected by the manufacturer when initially programming the vehicle ECU with specific instruction sets, such as fuel maps. A first sensor sends a message to a second sensor comprising the first sensor’s location and a key encrypted by a first SEV. Since the inertia of the vehicle is relatively small during non-towing travel, i.