Hi Paul

You are not stirring up a hornets nest, I will try and explain why you are getting some negative comments

The throttle pedal is made up of two potentiometers ie: sensor 1 and sensor 2. Each one has its own 5v supply from the ECU

For safety reasons when you put your foot on the throttle pedal the voltage rises on one side of the sensor and drops on the other, if they are rising and falling evenly on both sides, then the ECU knows the sensor (pedal) is working correctly.

You lost 5v on one side, so the ECU flags a code and it goes into limp because the throttle is not working correctly

Now your sensor has only one 5v feed, so if that is lost the vehicle could either stop dead or speed up on the motorway, at least with limp mode you have some control

Another example say: If you had a vehicle with two front electric brakes, both with a separate 5v feed, if one feed is lost you will still have one brake working to stop. If you join both 5v feeds together, then if that one feed is lost you will have no brakes at all

HTH

Peter