Electrical problem in wet conditions, Seat Ibiza 6L ASZ (Solution)

Hello everyone.

I've actually been having 3 problems for a while now, and they always seem to appear at the same time.

Whenever it rains heavily, the following errors occur:

1. Poor starting behavior, and the error memory shows "implausible camshaft sensor signal."
2. If the error described in section 1 occurs, I need to be careful that the engine doesn't stall when starting. This can happen quite abruptly. Furthermore, it can happen that the engine suddenly stalls while I'm already accelerating, meaning even when the torque is fully engaged, between 1500 and 2000 RPM.
3. If the two errors described in points 1 and 2 occur, it can happen that the engine, this time without stalling, simply refuses to accelerate. In that case, I have to coast to the side of the road, stop, give it some gas in neutral a few times, or turn off the engine. Then it runs normally again. This error only occurs very rarely.

When it's dry again, everything will be fine.

Here's what I've done so far, but it was useless:
Checked the connector from the camshaft sensor, located in front of the engine, for corrosion on the contacts.
Checked the connectors on the control unit for corroded contacts.
The control unit was opened and dried in the oven for several hours, then it was packed in a plastic bag.
I don't think it's the crankshaft position sensor either, because if it were, it would likely only cause a starting problem. Or am I wrong?

Perhaps one of you could suggest a connector that I haven't seen or checked yet, or a ground point that might be the cause of the problem.

Thank you in advance.
Best regards,
Jørg

Does anyone have any ideas? I am very disappointed .

Best regards, Jörg.

jörg schmidt wrote:

Does anyone have any ideas from you??? I am very disappointed

.
- Loose timing belt.
- Sensor failure.
- Cable from the sensor to the control unit is defective.

Can you check 1 and 3? If it's not true, it can only be due to reason number 2.

Oops, there was still an answer there .

Thank you for that.

The next ZR exchange is coming up, and that's when the sensor will be replaced.
However, I have my doubts, as I read here that the knock sensor is only needed for quick engine starting. Errors also occur during the journey.
I'm always open to being pleasantly surprised.

Best regards, Jørg.

jörg schmidt wrote:

Whenever it is very wet, the following errors occur

. I would try to identify the (triggering) accompanying circumstances related to this time-consuming and diffuse error pattern:
Which parts need to be wet? Taunus fog or Fahrgischt?
Can it also be triggered by spraying a few drops of water onto the engine? If so, where is the water supposed to come from?
Does it help in real-world driving conditions to waterproof these areas?

etc. etc.

I would replace it. We had a similar problem with a Focus, and I can confirm that the camshaft sensor is also needed while driving, because the car simply stalled, and then started again after a 10-minute break. After the new sensor was installed, there are no more problems, AND it runs more smoothly when idling, AND it's not as jerky when starting, AND it doesn't stall as easily.

Hey everyone,
It has to rain very heavily for a long time before the problem occurs. Often, it happens when I drive to Denmark in the rain, like it did last weekend. That was 850 kilometers.
I think I'm going to be taping things up for hours. I've already sealed the control unit with a plastic bag. Otherwise, there's not much else to worry about, and all the cables are inside the protective tube, which doesn't make it any easier. It's like trying to find a leak in a roof. Sometimes the water emerges from a completely different location.
It takes quite some time for the error to occur. Possibly, the wind could be forcing water in somewhere.
It's taking a long time, even now, two days, for the car to start normally again after getting wet. Okay, so without the few seconds of hesitation that I would normally expect to experience if the northwest sensor were to fail.
Right now, everything is back to normal. But just this morning, I was driving on the highway, and when I tried to switch to the left lane, the car suddenly stopped accelerating.
When I pulled over to the side of the road, it was suddenly as if nothing had happened, and I was able to drive normally again. One truck driver probably thought I was completely crazy .

I'm hoping it's the NW sensor. Perhaps there are fault conditions, such as a drop in operating voltage, that could trigger such symptoms.
You should always start with the simplest thing.

Thank you and greetings.

Jørg.

Hi,
Since unfinished topics are annoying, I'll give a brief update:
The error has not occurred again, not even in rainy conditions.
However, when replacing the ZR, have the NW sensor replaced as well.
I will report back on whether the error has been permanently resolved.

Best regards, Jörg.

For those users searching for the answer:
After the problems started occurring very severely even in dry weather, the engine wiring harness was replaced.
It was scraped against the transmission.
The problem is gone. It is reasonable to assume that this is also the case in humid conditions.

Best regards, Jörg.

Thank you for the feedback!

Better late than never .

I wanted to upload a few more photos, but somehow my permission for the upload area has been lost. (I'm waving at the fence post ).

Best regards, Jörg.

Why isn't the photo uploading under the correct category?

Is that also possible?
So far, I've only found solutions that involve linking to external resources, which is not ideal, or adding attachments from the upload area.

o.k., I've seen it now .
I'm probably going to need to get glasses soon...

Sorry.

Image of the chafed area without the wiring harness.

and the faulty point on the Y-connector leading to the starter.

Thank you very much for the feedback!

It was about time.
In my previous attempt, I was unable to upload the images. The computer kept loading, loading, loading, etc... After a few attempts, I gave up.
Yesterday, I tried it again, and it worked perfectly the first time.

Damn technology .

Best regards, Jörg.