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It tells me that I have 11k left for both oil change and service. Remaining distance to oil change and remaining distance to service are two different things in my car.

I went to this ADAC station because I wanted an engine power test anyway, so I had them do both: engine power test for 159€ (came out with 155-157 kW between 3600 and 4600 rpm with HVO fuel), and oil analysis for 99€. After 19.000 km, most oil parameters (iron, chromium, aluminium, tin, nickel...

In my area, the ADAC offers an oil analysis at 99€. At that price, you go there, they take a sample, send it to a lab, and you will get the analysis by e-mail. They don't specify how much of that is actual lab cost. However, the large majority of drivers wouldn't want to take the sample...

Never is a strong word. The bigger problem is... ... that cars do not detect low oil quality reliably enough. For example, if you have more DPF regenerations in urban conditions, you will get more fuel into your oil. Even though cars with variable oil change interval try to estimate the...

No need to apologize, maybe I sounded a little bit more harsh than I indended to.

Where does SSP 540 mention two NOx sensors? The Passat 2015 version has one NOx sensor before SCR, and none after SCR. The self-test of the SCR system is implemented by recirculating emissions after SCR through the low-pressure EGR valve back into the engine, so that they can be measured by the...

It was sold like that in Europe as well (and then they charged like 5€/l during service, when it was around 0,50€/l at fuel stations). I just don't want to use any word with positive connotation (like "concept") on it :D

"Concept" is a strong word. The EPA said that refilling DEF is "maintenance" on emission-related components. Maintenance on emission related components was only allowed if technologically necessary, and the EPA said it wasn't necessary to refill the DEF tank more often than during scheduled oil...

Hypothetically, you would see that problem if your NOx Sensor 1 was reading values that are too low, or if your NOx Sensor 2 was reading values that are too high. Normally, the car should make an estimation about what NOx 1 should be (NOx calculated behind turbo charger), and you could compare...

Why? Statistically, DEF problems are usually connected with refilling the DEF tank because many people don't read. Half of the DEF problem threads on German Motor-Talk forums, for example, start like this: "The MIL showed up, no engine start in 1,000 km, I refilled AdBlue, but the error doesn't...

Mathematically, this would make sense if you had 10% DEF and 90% water in your DEF tank.

Why would there be 2 NOx sensors on the exhaust pipe? Only cars with twin-dosing AdBlue system should have 3 NOx sensors (like EA288evo and EA897evo3 engines). In these cars, NOx sensor 2 measures NOx between SCR1 and SCR2. These engines appeared around 2020.

Unfortunately, I'm not aware of any testing method.

It could also be a cable or a connector, but yours would indeed not be the first one where this sensor is defective. Just for demonstration, I grabbed a screenshot from a 2016 Skoda Superb from skodacommunity.de, which should be a very similiar engine and AdBlue system:

Select the engine control unit, open advanced measurement values, and find the one for AdBlue fill level in the long list of values. There are probably several of them, some may report a percentage, but only the one that reports actual millimeters is supposed to be reliable. Could be IDE10249...

- If it was a nox sensor problem, the countdown wouldn't start at 1500 miles - If it was a nox sensor problem, the MIL would come up in the dashboard, and it would say something about "Error: AdBlue" That's much more likely to be the problem. You need to look at the sensor value that reports...

My comment about stress applies to both. There is just no way you can say UNfair, IMpatient or INactive, neither in british nor in american English. Interestingly, bonnet is a French word, but a hood/bonnet is "capot" in French :) Nope, and I don't intend to. I neither drink beer, nor do I go...

They don't sound like same. In German, stress usually moves to the negation prefix. In English, it doesn't. This even works for words which are written the same: German/English fair/fair UNfair/unFAIR Mispronouncing "unfair" in English is one of the top ten mistakes made by German speakers...

According to SSP 526, both EGRs determine their current valve position using a potentiometer that is integrated into the valve actuators. The ECU would know if an EGR valve was stuck.

Both EGRs are closed during engine start. If one is stuck open, it should store a trouble code about that, shouldn't it?