[Solved] Skoda Fabia 1.4 MPI: Power Steering Issues - Warning Light On/Off, No Support

Hello

Yesterday I came home after work. The car was parked in the yard overnight.

In the morning, when I went to work, I noticed that there was no power steering. (the power steering warning light did not appear).
I went to the workshop to have someone look and only after a few kilometers the light came on.
And now sometimes it burns and sometimes it doesn't.

I got into the tank and added about 200 ml of fluid.

However, the problem is still there.
The indicator light is on, but there is no support, neither visible nor heard.

What could be the problem?
Has anyone encountered such a problem?

The search engine fails. Either the harness on the side member is rotten or the pump itself, or rather its electronics

If so, can the harness be replaced? But how to get there?

And in the case of the pump electronics, is it possible to repair it or does the entire pump have to be replaced?

The harness you are asking about is located under the battery and it is best to remove the battery, air filter and its housing. As for the harness itself, of course it can be replaced, you just need a little patience. I suggest starting with this - check the harness from the pump.

Of course I'll start with this.

Does this bundle have any marking or symbol so that I could possibly purchase it?

Regards

fugas40 wrote:

Of course I'll start with this.

Does this bundle have any marking or symbol so that I could possibly purchase it?

Regards

On the website (if you explain what you want), there will probably be no problem with the purchase. However, you can play around with it yourself and solder wires with thicker insulation, then you will have peace of mind, at least for a long time, because in the original harness these wires have very thin insulation and this is the main reason for these problems. I am sending greeting and I wish you good luck.

Motronic wrote:

And do you know what it is? How can you be sure without a diagnosis that it's the beam?

We guess because such a fault occurs quite often, and when it turns out that the beam is actually damaged, the boy will save money (for a beer) by connecting it to the computer.

The diagnosis is recommended, but if you know it and use the search engine, you can probably look at the beam, it describes exactly where it is rotting.

Have him check the pump power fuse first thing in the morning, it's on the battery

If the car has been on the road, water has definitely got into the pump, what type of system do you have, TRW or KOYO?

Added after 4 [minutes]:

Although I had two cases in Polo and Ibiza, the cars came from the showroom and the pump died by itself, the only thought that came to my mind was the sensitivity of the system to low battery voltage

Friends, I have a problem with the power steering in a Fabia I recently bought. There were problems from the beginning, sometimes there was support and sometimes there wasn't. If it wasn't, just turn the engine off and on and it would come back. Moreover, I noticed that the support was sometimes very sensitive and sometimes more forceful. Additionally, the power steering pump was quite noisy and, despite the repaired alternator and new battery, the charging level was 13.6V. Of course, measured on the battery and the cable from the alcove to the battery is good. Charging on a 14.4V alternator. However, since yesterday I have had no support at all. When I tried to turn around in the street, the power steering disconnected and never came back on. I also noticed that when I stepped on the gas at idle, the lights brightened and dimmed. Turning the engine off and on does nothing. I can't hear the pump running at all. The light on the meter is not on. The VAG shows a constant error of the G85 sensor, which is probably the turning angle. The indicator light comes on only when the sensor is disconnected from the pump. I dismantled the pump and took it out of this sponge device and it looked OK, it wasn't even wet, it was just dusty.
I have a question: can a broken steering sensor completely turn off the pump? And can you check the quality of this sensor with an ohmmeter? I will also add that the harness going to the pump has been checked and is OK. Even the previous owner already hung it. The fuse is intact, there is voltage to the pump plug.
Broken pump or sensor? Is there a way to check on the table whether the pump is working?
Regards

Vagim, in the parameters, check whether the steering sensor works.

But in which block? Because I looked through these blocks and there was nothing. And it doesn't work that if the pump has a constant speed, it should increase when you turn the steering wheel? In my case, the pump does not work at all.

If you checked these blocks as needed and there was nothing, it was a damaged sensor or harness. You can eliminate what is needed with a meter.

The harness looks ok, it has transitions, the voltage is reaching the pump. I measured this steering sensor with an ohmmeter and it shows no reaction, no resistance change or anything. It still shows as if there was a short circuit. Can a faulty sensor completely disconnect the power steering? Because it's hard for me to believe that the pump would burn out since it's dry and sometimes it works and sometimes it doesn't.

Could you advise where to scrape it?

The thing is, it doesn't show anything. If you say it's a sensor, I'll look for another one.

Listen, should the steering sensor show any resistance between any of the pins of the plug?

Today I did some digging with the Fabia again and after connecting VAG it still detects a sensor error:
00778 - Steering Angle Sensor (G85)
49-00 - No Communications
It cannot be removed, it keeps coming back. From now on, the power steering light is also on. I also took into account damage to the pump, but there is voltage in each plug of the pump, and when the power supply is disconnected, the pump gives an error. This means that the pump is operational. Is the G85 sensor the same as the g250, i.e. the one that goes into the "U"-shaped steering gear? Because I read on the electrode that this g85 sensor is on the steering wheel together with the Air Bag tape and they were connected to ABS and ASR. And I don't have these things in my factory.
I want to make sure, because the cheapest sensor I could find is PLN 420, refurbished and return the old one.
Thank you for all your help.

Problem solved. The culprit for this state of affairs was a faulty steering sensor, which in turn led to the pump burning out, because it constantly gave a signal that the steering wheel was being turned and the pump was running at maximum speed. A new sensor and pump have been installed and I think there will be peace for some time. Additionally, I siliconized all the plugs and the steering sensor to prevent moisture from getting in accidentally.