Accelerator Position Sensor 1/2: Implausible signal

"That part is most likely the problem. It should be a plug-and-play replacement;however, you may want to try just cleaning the contacts on the connection before replacing the part."

Where would i be able to locate this part? Where is it on the car? Is it the one attached to the pedal?

"Are you sure it doesn't say "Throttle position sensor 1/2: Implausible Signal"? That would be a much more expensive repair. (Based on your recent flooding, this is unlikely the problem, however). Do you have the actual "error code"?"

You mention that based on the recent flooding it is unlikely the expensive part. Why is this? Is it located somewhere else? The only reason i ask is because i am having difficulties identifying which part is which on the car.

Again your time is much appreciated.

Thanks

This isn't looking good.

Tried cleaning the contacts with electrical spray cleaner now its coming on with a permanent EPC light with the following error

Throttle position sensor (G79) too high

Bought a pedal assembly and it didnt change anything. light still stays permanently on.

i cannot clear the code either with vag com.

i tried to monitor group 062 and noticed that the throttle position is operating out of spec at 99.2% (should be between 12% and 97%)

would the electrical cleaner mess anything up? i thought stuff like that is inert.

Am i missing something obvious here?

I'm tearing my hair out over this and i need to get this sorted asap as i need the car for xmas.

Any ideas anyone?

VW tends to issue engine codes with the second letter increasing in alphabetical order, so I'd expect your APU engine is most-similar to the US-Spec ATW (drive-by-wire, no variable cam timing).

Electrical cleaner should be the right stuff.

Try using the "vag-scope" to graph measuring block 062. The output in fields 3 & 4 should mimic the movement of the accelerator pedal in a "linear" fashion: moving from 0 to 1/2 throttle should cause the same change as moving from 1/2 to full throttle.

What error codes are currently showing? Still just P1639?

Is the "Check-Engine" light on all the time (picture of an engine), or is it the "EPC" light that is on?

Take a look at the .pdf I emailed you. In particular, the section "Checking voltage supply and wiring to control module". Use a multimeter to check the voltage at the pins on the engine-side of the wiring connector, following the instructions in that .pdf file. I expect you have a short to ground somewhere.

By the way, the 12% to 97% spec for the sensor output is for idling-conditions only... I think they discuss it some more in the .pdf file.

I wonder if you need to do a "kick-down adaptation", even though you have a manual transmission. Hmmm.

Okay I tested the wires and here are the results:-

- Connect multimeter to the following connector terminals for voltage measurement.
Terminal 1 + Ground (GND) 5.04v
Terminal 1 + 5 5.06v
Terminal 2 + Ground (GND) 5.04v
Terminal 2 + 3 0.00v
Specification: at least 4.5 V

one thing regarding the above test... I forgot to turn on the ignition so this test might be invalid.

looks like something is up with terminals 2 + 3 voltage wise possibly

- Also check wires for short circuits to B+ or Ground (GND).
- Also check wires for short circuit to each other.

these were both okay i think

Do you think this could be a problem with the ECU considering i have put in a brand new pedal assembly?