Sharan 2.0 TDI DPF, Error codes in the exhaust system

Hello,
"Does anyone have experience with the exhaust system on a 2006 Sharan 2.0 TDI with a DPF?"
I received an error message on the MFD (Multi-Function Display) today after starting the engine.
It says "Exhaust Workshop" and, in addition, the yellow symbol for the engine control is illuminated. The symbol and the error message remain even after restarting the engine.
Back home, I immediately connected my diagnostic adapter and read out 2 error codes. Because these are sporadic errors, I think the issue might not be very serious. I plan to visit a VAG workshop to get expert assistance.
Now, for a good reason, I am very skeptical about the diagnostic capabilities of so-called "experts." Far too often, completely incorrect diagnoses are made, and unnecessary parts are replaced. All for our hard-earned money. While this may not always be the case, it can happen.
To prevent this from happening, I would like to ask you to share any tips or expert advice you may have regarding this matter.
I am grateful for everything! Maybe I can even fix something myself.

Here are the details:

Vehicle type: 7M - VW Sharan.
Scan: 25 01 02 03 08 09 15 16 17 18 19 22 29 36 37 39 45 46 55 56 76

Vehicle Identification Number: WVWZZZ7MZ6V024256 Mileage: 100690 km
"Der schnelle braune Fuchs springt über den faulen Hund."
Address 01: Engine Control Module
Label file: DRV\03G-906-016-BRT.lbl
Part number SW: 03G 906 016 JP HW:
Part: R4 2.0L EDC G000SG 8350
Revision: --H02--- Serial Number: VWZ1Z0F2849799
Encoding: 0000072
Operating number: WSC 45209 124 54151

2 error codes found:
001137 - Exhaust gas pressure sensor 1 (G450): implausible signal.
P0471 - 000 - - - Intermittent.
Environmental conditions:
Error status: 00110000
Error priority: 0
Error frequency: 2
Mileage: 100,598 km
Time: 0

Environmental conditions:
Speed: 3276 RPM
Speed: 103.0 km/h
(no unit): 0.00
(no unit): 0.00
Air mass: 132.27 g/s
Temperature: 558.0°C
Temperature: 9.9°C

009299 - Diesel particulate filter differential pressure sensor: implausible signal.
P2453 - 000 - - - Intermittent.
Environmental conditions:
Error status: 00110000
Error priority: 0
Error frequency: 3
Time: 0

Environmental conditions:
Speed: 0 RPM.
Speed: 0.0 km/h
(no unit): 0.00
(no unit): 0.00
Air mass: 0.00 g/s
Temperature: 216.0°C
Temperature: 10.8°C

Readiness: 1 1 0 0 0


Best regards, Sharanfuchs.

Differential pressure sensor faulty or connection hoses chewed through...

Thank you for the information.
Where can I find the sensor? I'll take a look at that!

hello,

differential pressure sensors (pressure sensor 1 for exhaust (G450) = differential pressure sensor).
They are constantly breaking. It's even worse than it used to be, the coolant temperature sensor.

Unfortunately, I can't tell you where the seat is located in the Sharan.
often located near the firewall or on the back of the engine.

It's about the size of a matchbox and has two tubes and a plug attached to it.
Alternatively, depending on the situation, you can trace the hoses from the DPF (Diesel Particulate Filter) back to the differential pressure sensor.

If you are experiencing this type of issue, you should definitely also inquire about updated software for your engine control unit from your local dealer. Additionally, the new sensor needs to be programmed, and a forced regeneration should then be performed.

Hello Schraubi,
Thank you for the information.

I found it quite amusing with the Polo 9N3, as the sensor was deliberately placed in a very exposed location, practically begging to be replaced.

By the way, I'm seeing the same error message, with no signal.

Hello Benni,
That's interesting. I didn't know that the Polo also comes with a DPF.

By the way, I got under the car yesterday. Based on what I could see, I found what I was looking for. Two hoses extend from the first large pot, which is located in the exhaust system, approximately below the footwell, and run upwards into the engine compartment.
Here's the translation:

"There's a blue one and a black one, about the thickness of a pen. The black one is completely torn." It burst in two places due to excessive heat, causing the melted wire mesh of the casing to protrude outwards.
I'm just not sure if these are the hoses being referred to here.
Are the diesel particulate filter and the catalytic converter located close together in the same housing?
Furthermore, I couldn't tell where the hoses were leading to. I couldn't see anything resembling a sensor housing; the box is pretty packed.

Interestingly, however, since this morning, no error message has appeared after starting the engine. The yellow engine control symbol on the MFD also disappears after the engine is started, whereas it had previously remained illuminated constantly.

By the way, I stopped by the dealership earlier today before work. I wanted to leave the car there during the day to get an assessment. Unfortunately, they turned me away, saying something like, "We don't have time for window shopping." If they need to leave it there, who knows for how long? If there's a problem with the rental car, it's at my expense, and I want a signature guaranteeing unlimited replacement of all parts.
I almost threw up and had to leave for a while. That much rudeness and lack of customer service is just unacceptable.

Now I'm very curious to hear your opinions.
People, please help me, I'm about to cry. If nothing else works, I'll probably take my car to an independent garage, even though there's a risk that they might not be as familiar with the specific issue.


Best, Jo.

Quote:

These are a blue one and a black one, about as thick as a ballpoint pen. The black one is completely torn. He has burst in two places due to extreme heat, causing the melted wire mesh of the casing to protrude far outwards.

I think you're in the right place. I only know these hoses come in black/black... but that doesn't necessarily mean anything.
Only two rubber hoses connect to the exhaust system, and they are the ones leading to the differential pressure sensor. One is about the thickness of a pinky finger, and the other is slightly thinner.

Okay, let's start by replacing the line(s) and then we'll see.

I still don't know exactly where the sensor is located on the Sharan, but it should be near the air filter. Hopefully, I'll have a chance to examine a Sharan with the necessary tools tomorrow (although I'd rather avoid using those tools if possible).

Hello Schraubi,
It could be behind the air filter. That's the direction the hoses are running.
I'll check it out tomorrow. Thank you in advance for your help!

To all those interested,
Here's an update on the progress.

I finally had an appointment at the workshop today, and after the service, it looks like this.

As mentioned before, the hoses in question are the supply lines to the pressure (differential) sensor.
The sensor and hoses were completely replaced, and a complete kit was used for this.
The sensor was calibrated and a regeneration process was performed.

Interestingly, the hoses have been replaced with solid metal pipes. That clearly indicates that there was a need for action in this situation.
The joke cost me 310 euros, which is not exactly cheap.
But now, here it comes. He also wanted to replace the diesel particulate filter because, according to him, it's almost full with 147 grams.

Okay or not okay? Regardless!

I managed to stop him just in time. I thought I should do some research first, because when I asked how much the particulate filter would cost, he told me it would be almost 1000 euros net, plus labor costs.

So, I experienced nausea for the second time.
What the heck is going on!!!

Okay, now here are the logical questions for me and for anyone else who is interested in learning more.

What prices are you familiar with?
2) Is the particulate filter actually almost full with 147 grams of ash content? Is the limit 150 grams?
3) Is the ash mass reduced again through further regeneration processes, or is the given value a final value?
4) Besides the original VW particulate filter, there are also products from third-party manufacturers. Are there potentially differences in quality or expected lifespan between these products?

Here are my vehicle's specific data and the currently read sensor values:
Sharan 2.0 TDI DPF.
Year: 2006
Engine code: BRT
Type: 7M6T83
Mileage: 101,000 km


48.0°C - Temperature before the turbocharger.
42.0°C - Temperature inside the particulate filter.
0.00 Differential pressure, particulate filter.
0.00 Offset differential pressure.
5.5% Loading factor.
147.0 Ash content
0.0% Ash content.
0.0 s Regeneration time.
0.0 Unsuccessful regenerations.
Successful regenerations.

I would appreciate it if you could provide some information on that.

Best, Jo.

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Hello Sharanfuchs,

I'm new to this forum and just came across your post. Here's what I can contribute (in brief):
Last July, I also received the "Exhaust System Workshop" error message. I then visited a VAG "specialist workshop." The diagnosis was that the wiring harness to the differential pressure sensor was burnt. Since the wiring harness was not available in the short term, I was sent on my way with the car, with the warning that the particulate filter could become clogged and that I should expect a loss of engine power. After the repair, they will attempt to regenerate the DPF.
Then this happened: I got stuck in a traffic jam that involved about 1 1/2 hours of stop-and-go driving. After the traffic jam cleared, the engine suddenly stopped working - engine failure!
The subsequent investigation revealed the following: The burnt-out exhaust pipe disabled the DPF's cleaning function. As a result, the DPF became clogged. As a result, two pistons broke.
Volkswagen no longer supplies the differential pressure sensor and its associated hoses in plastic; they are now made of metal. The sensor is located in a somewhat concealed area on the front panel, slightly to the right of the center (in the direction of travel). It's a small box where the two control lines and a small wiring harness fit.

Best regards, Tom.

Hi,

Quote:

As a result, two pistons broke.

More unlikely, mileage?

Best regards, Rainer.

Hello Rainer,

Approximately 215,000 km, no chip tuning or similar modifications. 2.0 TDI DPF, manufactured in 2006 (BRT engine). Maintenance performed according to the longlife service interval.

According to an expert, the most likely cause is a defect in the fuel injectors due to overheating, which is caused by backpressure from the exhaust gases.
Even Volkswagen, with whom I am currently in a dispute, does not question this. The issue at hand is whether I was informed about potential consequences before continuing to use [something].

Best regards,
Thomas

Quote:

The dispute concerns whether I was warned about potential consequences before continuing to use it...

If your car has been regularly serviced at a VW dealership, you should have the Mobi-warranty.

It's very strange that they didn't just send you on your way with a rental car.
simply because of the potential (and very likely) damage to the DPF.

Is there perhaps a workshop invoice with a corresponding warning?

Quote:

Due to the burnt-out wiring, the DPF's cleaning function has been disabled. As a result, the DPF became clogged.

You don't necessarily need a clogged exhaust system for this to happen. A faulty differential pressure sensor, for example, is enough to trigger the regeneration process to be suspended until the defect is resolved.

In my opinion, you shouldn't have been allowed to continue driving the car for these reasons.
I'm not sure whether a blocked DPF can actually lead to such engine damage.

Hello,

That's exactly the reason for the dispute. At that time, I had a mobility guarantee. She immediately offered her help when I broke down with engine trouble while I was out and about.
There is also a workshop order for the actual cause. After the damage could not be repaired due to the missing part, the mechanic called me and told me that I could pick up the vehicle and use it with the aforementioned limitation. - I had told them the day before when I dropped off the car that I needed to remain mobile.
I did not receive any information about a replacement car, and based on the mechanic's statement, I didn't feel the need to ask about it. I did not receive any warning about the risk of engine damage at that time.
In subsequent correspondence with the workshop, it is claimed that I was warned about the risk of engine damage. However, I would have been astonished if such a warning had been given, and I would certainly have paid attention to it. And for such serious matters, a workshop should document such things in writing. However, she couldn't, because that information was never provided.

Now I'm getting into too much detail. Actually, I just wanted to briefly share my experiences regarding the original problem.

Perhaps it's worth asking here: Has anyone else with a Sharan 2.0 TDI DPF engine experienced a clogged exhaust pipe with the corresponding error message? It could be a fundamental problem, especially since VW offers metal instead of plastic pipes for repairs.

Best regards,
Thomas