Accelerator Position Sensor?!?

[jtman79]

So i've been doing my best googling over the last few days but nothing I've come across has any solid answers... Im almost positive that my issue is electrical wiring problem but here we go...

I was driving with my cruise on at about 85km/h when suddenly my cruise control shut it self off and my EPC and traction control lights came on... i noticed a huge loss in power almost like i had no turbo at all. roads where wet but not soaked and it wasn't raining. So i parked it and left it for a day frozen in a snow bank, fired it up no issues, cruise was back all the lights were gone.
I scanned it and the faults where there and cleared them, they didn't come back and i relearned the steering angle too. I did the output test on the throttle position sensor and at full throttle one of the banks only read a max of about 78% and lower value was about 17% seemd odd... I took it for a hard drive (really hard) and the problem didn't come back and my power was all there. today i drove it again and from cold start the issue was back... the car was wet but not soaked again it wasn't raining but cold.

Some people are saying my O2 sensor shorted and ruined my ECM but i feel as i could clear the codes and the problem went away that this is not the case... I am not sure however if the Throttle position sensor is the issue either, as it is intermittent. Im going to test the wiring from this cut out here http://mtroxel.com/audi/p2138.pdf although it is for a B5 platform... I've done a visual check my O2 wiring and all seemed OK. It says failure of the pedal is very rare and its more likly to be the ECM... anyone with solid information welcome I'm at a loss ad want a Golf R...

Here is a copy of the relevant scan

18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
P1639 - 008 - Implausible Signal - Intermittent
17977 - Cruise Control Switch (E45): Implausible Signal
P1569 - 008 - Implausible Signal - Intermittent
18042 - Accelerator Position Sensor 2 (G185): Signal too High
P1634 - 001 - Upper Limit Exceeded - Intermittent

[4whelsimdriving]

Did you ever fix this???

- - - Updated - - -

I've replaced the accelerator Pedal? I have a 2002 2.8l GLI I replaced the pedal because it was throwing codes p2138, G79/G185, p1639 but after driving epc light ABS and Trac light come on again.. I'm lost any input would be helpful
18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
yeah I'm at a loss.. the only codes it threw were the ones listed above. If it had something to do with the TB itself I would think different codes would come up? The scan was done on a Solus Ultra (snap-on) also cleaned the TB (alot of carbon build up) and clean Mass Air flow sensor. But adapted TB Also Replaced the brake tailight switch just to be sure. Still same thing. Also when I release the brake pedal I hear a hissing sound but my pedal doesn't seem hard nor does it make noise while driving just when i let off the pedal? Does this mean brake booster or master cylinder bad?? Guess it sounds like i need a ECU. I have 1/2 throttle though it only comes on in a middle of me drive and limits my power to half

[jtman79]

Did you ever fix this???

- - - Updated - - -

I've replaced the accelerator Pedal? I have a 2002 2.8l GLI I replaced the pedal because it was throwing codes p2138, G79/G185, p1639 but after driving epc light ABS and Trac light come on again.. I'm lost any input would be helpful
18047 - Accelerator Position Sensor 1/2 (G79/G185): Implausible Signal
yeah I'm at a loss.. the only codes it threw were the ones listed above. If it had something to do with the TB itself I would think different codes would come up? The scan was done on a Solus Ultra (snap-on) also cleaned the TB (alot of carbon build up) and clean Mass Air flow sensor. But adapted TB Also Replaced the brake tailight switch just to be sure. Still same thing. Also when I release the brake pedal I hear a hissing sound but my pedal doesn't seem hard nor does it make noise while driving just when i let off the pedal? Does this mean brake booster or master cylinder bad?? Guess it sounds like i need a ECU. I have 1/2 throttle though it only comes on in a middle of me drive and limits my power to half

So I actually found the source of my issue, a chunk of ice broke the ECU cover, water was leaking into the ECU and puddling at the connections and causing the fault. I glued and sealed the plastic cover around the ECU and all was well, I would suggest doing the same thing, looking for connector issues and water at the ECU.

Cheers.
Jamie

[4whelsimdriving]

Thank You! That's what I will be doing