Hi all, so in February I had a very unfortunate event, I grabbed the wrong pump at the gas station and filled my car up with petrol instead of diesel, I put in a good 50l. It started running very badly after like 1km, but I live quite close so I went max 4km like this in total. When I got home I realized what happened. There was heavy smoke coming out thru the rear wheels and smell of burnt plastic. I got the car towed to the service and it was cleaned, they replaced the diesel filter but nothing more.

 

After this I started getting DPF regen error. I have VCDS and I saw one sensor on it was giving odd readings. I changed it myself and the DPF regen error was gone. 

 

I also noticed it has ash deposit of 55g and I coincidentally saw this product, so I sprayed a bottle of it into the DPF where the front sensor goes. I am not a smart man:

 

 

After a few hundred KMs I started getting this error and the check engine light came on. I cleared it many times but it always comes back. The car now smells like an absolute dumpster when running, and I can sometimes smell it in the car on the highway, with the windows up. I had a 400km trip yesterday and could smell it occasionally, got a really bad headache and nausea by the end. I explained everything to the mechanic I go to, he just erased the error again and said it's alright. I'm super sure it's not. Please help!

 

1 Fault Found:
8195 - NOx Catalyst/Trap Bank 1 
          P2000 00 [237] - Efficiency Below Threshold
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 228140 km
                    Date: 2023.02.19
                    Time: 19:16:13

                    Engine RPM: 1707.50 /min
                    Normed load value: 35.3 %
                    Vehicle speed: 61 km/h
                    Coolant temperature: 89 °C
                    Intake air temperature: 82 °C
                    Ambient air pressure: 990 mbar
                    Voltage terminal 30: 14.700 V
                    Unlearning counter according OBD: 40
                    Accelerator pedal travel: raw value: 30.58 %
                    Particulate filter output: temp. sensor 1: bank 1: raw value: 277.0 °C
                    O2 sensor 1 bank 1 dwnstrm cat.: raw value: 0.9624
                    Setpoint generation interior torque: 93.2 Nm
                    Setpoint generation interior torque: 93.2 Nm
                    Throttl.valve adapt. 1 bank 1: posit feedback - Specified value: 85.60 %
                    O2 sens. 1 bank 1 upstrm oxi cat: raw value: 0.9565

Readiness: 1 1 0 0 0

It's possible, I am no expert you understand, that the  fuel system is 'toast' , kaput, no good. 

If I understand you right , you have a Derv ,you a cidently fuelled with Petrol,  you would've be the first to have done it, I confess I have.

 I too accidently put petrol in a Derv. In my older mk 2, I realized very quickly that I had , immediately switched to Diesel filled to the brim.

The problem here is the derv fuel system works on a very high pressure system, petrol will ruin it,  as soon as you attempt to start the car, even before the engine is turned over, the high pressure system is running.

So driving a short distance with petrol, is going to wreck the fuel system.

I got lucky I realized my mistake, they say if you mis fuel, don't even attempt to run the engine, have the system drained ,cleaned, and refilled, myself I drove less than 1 km to a friend's house, and asked what to to do, fortunately the old 1.9 PD is a tough old engine, ,....because only put a few litres of petrol I. ,I diluted it with another 55 of Derv,  friend said it might run rough, but keep filling it up, it might be ok.

That's what happened in the end , it was containimated but it ran fine  ,untill I sold it on at 100, ooo miles on the clock.

 

So , I believe that's the case with you, the injectors and high pressure system derv pump is no good, had you dropped and cleaned the tank, you might have be Ok , your 5 km just might have been to much on a tankfull of petrol.

The vehicle is running so I dont think the pumps and injectors have been damaged, it sounds more like the DPF is regenning all the time or is still trying to burn off the snake oil it was force fed.

1 hour ago, J.R. said:

The vehicle is running so I dont think the pumps and injectors have been damaged, it sounds more like the DPF is regenning all the time or is still trying to burn off the snake oil it was force fed.

This makes sense to me, the car runs just fine minus the stink... I'll give this mechanic another shot at fixing it.

Where did you sprayed the DPF cleaning foam because what you see behind the engine is the catalytic convertor? I haven’t tried such cleaning method but from the product name I suppose this needs to be sprayed in the DPF which is underneath the catalytic convertor.

 

The problem with petrol is that it’s dry and the return fuel doesn’t lubricate the injectors and they get worn out, but hopefully for the few km you had driven, nothing happened. Next time add some 2T oil if you can’t remove the petrol immediately  

 

 Try to force regen the DPF with the diagnostic software, ask the mechanic to try to do so.

 

15 hours ago, fr1nklyn said:

 Next time add some 2T oil if you can’t remove the petrol immediately  

 

 

Next Time??

13 minutes ago, Gerrycan said:

 

Next Time??

I did this twice for my 15 years experience with the diesel engines. Hopefully not, but… Just have it in mind

15 hours ago, fr1nklyn said:

Where did you sprayed the DPF cleaning foam because what you see behind the engine is the catalytic convertor? I haven’t tried such cleaning method but from the product name I suppose this needs to be sprayed in the DPF which is underneath the catalytic convertor.

 

The problem with petrol is that it’s dry and the return fuel doesn’t lubricate the injectors and they get worn out, but hopefully for the few km you had driven, nothing happened. Next time add some 2T oil if you can’t remove the petrol immediately  

 

 Try to force regen the DPF with the diagnostic software, ask the mechanic to try to do so.

 

I've forced DPF regen several times since, I'm not sure it's helping. Is it possible that it's just taking a long time to burn all the crud out from the system, and it might fix itself in some KMs? I've done at leat 2k km since this happened.

1 hour ago, yossarianus said:

I've forced DPF regen several times since, I'm not sure it's helping. Is it possible that it's just taking a long time to burn all the crud out from the system, and it might fix itself in some KMs? I've done at leat 2k km since this happened.

I don’t know but you can hope for it, having in mind the DPF reaches 600-700 C during a regen.

Keep in mind that regens always produce some slight burning smell, so don’t expect that to disappear completely.