Bohemian
New member
My 2013 Jetta manual transmission is displaying Check engine light. OBD tells me it is Error code P2478. Can someone give me specific information what that means?
Error Code
- Thread starter Bohemian
- Start date
Lightflyer1
Top Post Dawg
A search on the web should pull up the definition of that code. Should be covered by warranty (Extended Emissions Warranty). Take it in. Assuming you aren't over the mileage/time limits.
Bohemian
New member
Update: The exhaust system on the diesel is quite complicated. The first thing the exhaust gas enters is the DPF, Diesel Particulate Filter canister. This one unit consists of two separate processes. First Oxidation Catalyst section and Diesel Particulate Filter, both in one assembly. This one container has three temperature sensors. First is at the input flange to the device, second is in the device, the third is on the output of the device. I was not able to find out which one of the three may be the problem. I have reasoned the first sensor experiences the harshest conditions so I have replaced that one, the first temperature sensor of this system. I hope this was the right choice. It's been four weeks now, five full fill ups of fuel, and so far so good. I like to think this problem has been resolved. To truly understand what is actually happening in this exhausting process one needs a degree in chemical engineering.