fault codes and directions for were to look

[g.gladwin]

Howdie people, basically I found these 3codeson my 03 1.2 clio dynamique using a cheap diagnostic machine

Df135 brake pedal circuit, signal incoherence, any idea were to look as google aint showed anythn

Df208 upstream sensor signal input, short circuit to +12v again no luck with google search

Df126 pedal potentiometer circuit track 2, short circuit to earth no luck searching this either


If anyone could tell me wear I could look to check these problems it would be a great help, thanks

 

[Owen92]

The main question is, is there any noticeable faults with the vehicle? By that I mean is there any symptoms of a fault that can be noticed without a cheap code reader? If the answer is no, then the faults are more than likely inactive and you'll be on a wild goose chase trying to trace a fault that isn't active.

 

[g.gladwin]

Thanks for replying owen92 , everything seems fine with the car except its gone into limp mode twice, oncewhen I tried to drive up a car and was over revving and the second was when I was reversing up a hill caught the curb and over revved again, but I dunno if that matches the fault codes at all, thanks george