Hi 

 

My girlfriend has a 2014 rapid spaceback 1.2 Tsi

 

She was driving home tonight and kept struggling to keep up to speed for the motorway and couldn't get past 55mph and kept dropping below 50mph.

 

Her check engine light came on so I checked it when she got back with my basic scanner, and I got the code:

 

P2138

Throttle/Pedal position

Sensor/Switch D/E voltage

Correlation

 

I'm not sure if it will be the cable itself as the looms are all untouched and we'll wrapped, but I could be wrong.

 

Will this be the sensor attached to the throttle body or is it possible it might be the sensor on the pedal?

 

Has anyone had this problem before.

 

Any help will be great

 

Thanks

 

18 minutes ago, Franky89 said:

Hi 

 

My girlfriend has a 2014 rapid spaceback 1.2 Tsi

 

She was driving home tonight and kept struggling to keep up to speed for the motorway and couldn't get past 55mph and kept dropping below 50mph.

 

Her check engine light came on so I checked it when she got back with my basic scanner, and I got the code:

 

P2138

Throttle/Pedal position

Sensor/Switch D/E voltage

Correlation

 

I'm not sure if it will be the cable itself as the looms are all untouched and we'll wrapped, but I could be wrong.

 

Will this be the sensor attached to the throttle body or is it possible it might be the sensor on the pedal?

 

Has anyone had this problem before.

 

Any help will be great

 

Thanks

 

 

Yes I've had the very same fault code when read. Mine too, although a Toledo (same engine and most other components under the skin) went into limp mode, no power. Codes read by myself then the garage came up with throttle position sensor faulty. Cleared codes and it happened again after a short while. Also I had the traction control and also the engine management lights come up too.

Remedy for mine, I had a new battery fitted, less than 5 years old it was failing and not providing enough for the car, btw mine's a stop/start.

Man at the garage says he's seen a few vag cars with similar code faults, new battery sorted them.

Not saying it's your fault 100% but just get the battery checked as a first call, it may save a long list of trial and error fault finding, throttle position sensor quoted for my car £112, not needed but a new battery £140 heavy duty was.

Edited 17 February, 20215 yr by MickA

Hi MickA thanks for that I had my battery checked today at a garage, it was all showing as ok.

I've been driving it afterwards and the engine light has been off and its not gone into limp mode and I gave it a good run on the motorway the the code was still showing as a stored code :s 

 

I got home and started checking the connections on the pedal and throttle I ended up taking the throttle off to see if there was any built up gung on the throttle plate that might be making it struggle, the throttle plate was clean but it was coated in engine oil and I looked in the intake and there was a puddle of oil in there :s I'm guessing at the moment it might be a leaking pcv valve or something in that area. Not sure if this would be causing the throttle to play up but I think this needs sorting and see if it helps.

Was it, or had it been raining when the original fault occurred ?

 

If so, could be a small water leak under the windscreen area dripping onto the throttle pedal or wiring. 

Thanks PipH, coming to think about it, it was raining that night.

 

I think I might leave a hose pipe running over the windscreen for a while and check if theres any water getting in.

 

I've drove it again and theres no issues and the engine light is still off, I cleared the code but it's still showing as amber on the reader so I'll see how it gets on. 

 

Do you know if vcds could pinpoint if it's the pedal or throttle? 

 

" Do you know if vcds could pinpoint if it's the pedal or throttle? "

 

Pretty sure there would be separate fault codes for a pedal fault or throttle valve in VCDS.

Also there would be measuring blocks to read sensor data.

 

This is a guide to available measuring blocks:- https://www.ross-tech.com/vag-com/m_blocks/