Hello there.  There is a strange noise when parking my car on a slight slope.  The sound only occurs in 1st/reverse gear, when the engine has reached normal operating temperature and when I park on a slight slope. The noise disappears shortly after I release the accelerator and shift into P. When I took my car to an authorised Skoda service centre, they could not find the source of the noise. After a week of correspondence with the Czech factory, it was decided to replace the DSG (under warranty).  However, the noise persists even after the DSG has been replaced. The Skoda service technician stated that when he tried the same conditions in two different Kodiaqs, model 2023, the same noise occurred. As a result, I am left with an annoying noise of unknown origin. I would appreciate any assistance you can give me on this.

I have a Kodiaq Sportline 1.5 tsi, 110 kw, 4x2 with DQ381 dsg, 17.000 km.

Does it sound louder in the front, the back or no difference?  It sound vaguely like a fuel pump to me (but what do I know?).

There is no difference, it cannot be distinguished when I stand next to the car. I forgot to write, the first suspicion was the oil pump of the gearbox. Of course, changing the pump did not solve the noise problem.

I agree, to me it sounds like a pump.  Based purely on Youtube videos,  it reminds me of a faulty fuel tank sender pump however that'd obviously be louder near the fuel tank at the rear.

@tosois Autohold enabled?  When you are parking I assume you are pressing the brake pedal. Are you pressing hard enough that Autohold actuates? Then as you move that goes off, as happens when you go to P and the e-brake activated target than Autohold.

22 hours ago, Dappernut said:

I agree, to me it sounds like a pump.  Based purely on Youtube videos,  it reminds me of a faulty fuel tank sender pump however that'd obviously be louder near the fuel tank at the rear.

Yes, probably for the reason you mention, it was thought that there was no problem with the fuel pump.

21 hours ago, Ootohere said:

@tosois Autohold enabled?  When you are parking I assume you are pressing the brake pedal. Are you pressing hard enough that Autohold actuates? Then as you move that goes off, as happens when you go to P and the e-brake activated target than Autohold.

Yes, auto-hold is engaged, Ootohere. But they confirmed that the noise wasn't coming from the wheels or the brakes. 

The actuator is not beside the wheels.  But it is holding the brakes.   But then these professionals will know this....

2 hours ago, toso said:

Yes, auto-hold is engaged, Ootohere. But they confirmed that the noise wasn't coming from the wheels or the brakes. 

 

Oootohere's diagnosis is pretty much the only plausible one given the noise only happens when parked on an incline.

On 27/12/2024 at 12:51, Ootohere said:

The actuator is not beside the wheels.  But it is holding the brakes.   But then these professionals will know this....

Ah, I didn't check the forum in the morning, so I couldn't tell the service about your idea. 

 

I just came back from the Skoda dealership for a check after the DSG change. I had a chance to talk to the mechanic who worked on my car. He said that they were almost certain that the source of the noise was the gearbox oil pump, because when they cut the power to the oil pump during the noise, the noise disappeared immediately. However, when they checked some parameters such as oil flow rate etc. during the noise, they did not find any abnormal readings.  He added that this was the first time the factory had encountered this noise problem and that they would probably recall the old gearbox and check it. I guess I'll have to pray that the oil pump doesn't say "I'm done" until the factory finds and fixes the problem.