Error 18047 - Accelerator Pedal Sensor

My A3 1.9 TDi had to go to the garage today - Diagnosis according to the fault memory:

Error 18047 / 00777 in the Engine Control Unit (ECU)

Engine runs with increased idle speed, does not respond to throttle.
Error code 18047 or 00777 (Gas pedal position sensor) stored in the engine control unit.

Cause:
The corresponding resistance values for the accelerator pedal position, as specified by the sender, are not or are incorrectly transmitted to the engine control unit. Since there are no other components involved in the direct connection from the accelerator pedal to the engine control unit, the following causes are the only ones that could theoretically be responsible for this fault:
- Faulty accelerator pedal position sensor
- faulty connection
- Moisture at the electrical contacts

------------

My friendly Audi dealer only said that it would take a while, he needed at least 3 days, and it would get expensive in the meantime, and he had to report it to the central office.

Sigh. What's coming towards me now?????

MARK

marrot wrote:

Sigh. What's coming towards me now?????

Perhaps a moderate control, which directly leads to the intention "DIY instead of a workshop".

To absorb this knowledge, you're in a good place here...

500 tux won't be enough....

but why does this have to be reported to the central authority or someone else? If it's something related to the WFS, then I would understand, but to Gaspot...

My friendly Audi dealer only said that it would take a while, he said it would take at least 3 days, and it would also be expensive, and he would have to report it to the central office.


Did you also ask him why...?

... how long does he need the car?
... does he need to report this to the headquarters?

Would be very interesting to me - and probably to others as well.

What should it cost 500 euros? Was ist das nur ein Scherz?
So, be honest

Well, he just said that he needs to report it to the central authority because he needs some approval for the part from Ingolstadt. That's all I know.

How much should it cost, 500 euros? Was I'm just kidding, right?
So, be honest

Well, he just said that he needs to report it to the central authority because he needs some approval for the part from Ingolstadt. That's all I know.

The 500 'tux' are not a joke. As far as I know, the 'electronic accelerator' has cost quite a bit, probably over 400. In addition, there are the significant hourly rates from the workshop...

but I don't understand the approval at all. The way you write it only makes sense if there is some kind of goodwill involved....

Hi,

@marrot
{ERROR_TYPE} had the same error with the same error diagnosis.
The gas pedal was replaced, but it only lasted for one day, but it wasn't.
Subsequently, they stated that the engine control unit was broken, and I then said that they should first
Inspect the contacts for corrosion and, lo and behold, the contacts on the engine control unit are corroded.
=> Contacts cleaned, everything is okay. Had it done at a workshop back then because of {REASON}
Kindness. I probably wouldn't do that anymore.


{QUESTION}
One can use VAGCOM to query the accelerator pedal position 0 - 100%, would that be helpful in case of a defective
Can't you see the jumps?

Achim wrote:

You can use VAGCOM to query the accelerator pedal position 0 - 100%, wouldn't you see jumps if the potentiometer is faulty?

Yes, at least. Or even constantly zero values or the like.

Another possibility is a fault in the standby contact:
The engine computer expects the contact to open or close within a specific percentage range.
If not, the entire device will be recognized as defective, even though the problem might only be with the connector to the standby switch.

this might help with troubleshooting - the shutdown always happened immediately after the gear shift (i.e., when the car was essentially idling for a second) and not during acceleration or under full load, etc., but only immediately after the gear shift... the idle remained, which was a major concern

marrot wrote:

might this help with troubleshooting - the shutdown always occurred immediately after the switch was turned off (i.e., when the car was essentially idling for a second) and not during acceleration or under full load, etc., but rather just immediately with the gear shift

And how long could you normally drive / how often could you shift before the error occurred?
Differences Warm / Cold Start?

The error occurred quite regularly after about 20 minutes in city traffic (approximately 15 km). It has only occurred when the engine is warm. I'm curious to see what happens tomorrow when I have an appointment with my friendly .

marrot wrote:

The error occurred quite regularly after approximately 20 minutes in city traffic (approximately 15 km).

So far, this has only happened when the engine is warm.
Hm, that looks like a thermal fluctuation problem to me.

Now you could, for example, with a cold engine, heat the wiring harness between the engine computer and the pedal sensor with a strong hair dryer and try to see if the idle increases at some point = idle speed.

Or, try to wobble at as many points as possible and thus try to provoke or "fix" the error...

In case of success: Remove electric cutlery / soldering iron and prevent the "Friendly-Expensive" from messing up the business

thanks for this tip
...I just got back from my friend's place; my car is ready.
(It also became a time when I only had a 1.6 as a replacement car)

as expected, they simply replaced the accelerator pedal.
At 60,000 km, I received 90% of the warranty coverage.

I've already driven 100 km so far, and everything is working perfectly.
Hope this stays the same, otherwise I have a few tips

thanks & best regards