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2013 Ford Focus ST1
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I have the same exact issue, I changed the CPP sensors but there are 2 and one other member had the same issue and ended up changing it for the third time to get a good working sensor.
I haven't changed the the upper side sensor yet, its pain in the ass but I did change the master cylinder pedal assembly when I put in a new clutch.
You can test it by reading the CPP switch readings should should 50-100 and 0-50 something like that mine is either 66.7 or 100%.
I am guessing your cruise control wont turn on too as safety measure?
It sure is a pain in the ass to get to the upper clutch pedal sensor without taking the pedal assembly out of the car. I had a clutch replacement done about a year ago (including all hydraulics) and my shop didn't attach the upper sensor to the pedal (although it is still connected and no defective). As a result I now have to press both clutch and brake pedals to start the car and also now have to hold the start button until the engine fires. Cruise control still works normally though thankfully, because I simply can't reach the upper sensor. :cautious:
 

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2013 Ford Focus ST1
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It comes with the sensor. I installed an RS master on my buddies '13 ST.
@Duece McCracken - So expand a little on this - are you saying that the Ford Focus RS clutch master has the pedal sensors integrated (both of them?) I have had a long running "problem" with my 2013 (ever since I had a shop change the clutch and clutch hydraulics) where the pedal pressed sensor was not reconnected and now I have to press both brake and clutch to start the car and I also have to hold the start/stop button until the engine fires. I tried in vain to reach the sensor up in the firewall but I simply can't get to it, so I have lived with this (admittedly first world) problem ever since. Would swapping for this RS clutch master be an alternative solution to my problem, or is the "view not worth the climb"?
 

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2013 Ford Focus ST1
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Wont do anything for a pre facelift. We installed the master on a 13' we are using the 13' cpp switches. The RS cpp is unplugged, integral to the unit. 15plus have a different wiring harness, which has the cpp connector by the clutch master in the engine bay.
Well dammit! As I was writing that I figured that the wiring had to be different too.......any other advantage to the RS clutch master over the ST ?
 

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2013 Ford Focus ST1
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If you have the same exact issues as my car, and you have a 13' why not swap the 2 sensors on the clutch pedal assembly?

I used a new 13' pedal assembly which didnt have the sensor, I changed my sensors 3 times lol, I will change it RS pedal once I go BT and report back.
I dont mind the new start up sequence, but I do miss my cruise control :/
Only one of my 2 sensors was accidentally not reattached after the master cylinder was replaced. It is the pedal down sensor, so fortunately cruise control works fine still, because that relies only on the pedal up sensor. Because of the location of that sensor I simply can't reach up far enough to clip it back onto the pedal. ......
 

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2013 Ford Focus ST1
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Is there any local ST members that can assist?

Reattaching the sensor makes more sense than running wires into the engine bay, lol
I totally agree! I spent several hours on it at the time and gave up - I'm not a big guy and have fairly "normal" hands and I just couldn't do it. Couldn't really see either. I even tried taking the knee airbag out to see if it would improve access up there. The other curve ball possibility is that the fit for the pedal down sensor to the pedal itself may be different (or missing?), because I actually bought a pedal/master assembly for the 5-speed (non-ST) car. This pedal assembly is slightly different and also does not have the over-center assist spring, so I actually prefer the more linear clutch feel with this pedal.
 
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