W205 Fult Code P13DF
Thread Starter
Newbie
Joined: Jan 2019
Posts: 5
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W205
W205 Fult Code P13DF
Hi
My car has the engine management light on and after a scan its showing fault code P13DF.
Does anyone know what the fault can be? I have reset the code but 3 days later its back on again. My car drives perfectly fine and no other issues.
Thanks
My car has the engine management light on and after a scan its showing fault code P13DF.
Does anyone know what the fault can be? I have reset the code but 3 days later its back on again. My car drives perfectly fine and no other issues.
Thanks
Newbie
Joined: Mar 2023
Posts: 1
Likes: 0
S205
W205 code p13df
hi have same problem. My addblue injector was blocked had it cleaned and code still on .my car is 7 years old .got in touch with Mercedes and they said a recall is on my car for nox sensors .they will do a software update and change sensors if needed f.o.c even tho out of warranty. All I did was Google addblue recalls put vin no in and it tells you if your car is affected.
Newbie
Joined: Sep 2025
Posts: 7
Likes: 2
From: United Kingdom
Mercedes-Benz S550 (S-Class)
Hey,
I’ve actually come across the P13DF error on a few cars before. From what I understand, it’s usually linked to the NOx (Nitrogen Oxide) sensor. Even if your car drives perfectly fine and doesn’t show any other issues, this sensor is still part of the emissions and engine management system. That’s why the engine management light keeps coming back until the underlying issue is sorted. Sometimes this code can appear if the sensor is starting to fail or if it’s getting contaminated over time. In other cases, it can be caused by wiring issues or poor connections around the sensor, so it’s worth giving those a quick look too. I actually found this replacement NOx sensor: https://xenons4u.co.uk/mercedes-benz...ox-sensor.html. It’s worked for quite a few people, but I’d definitely recommend checking that it’s compatible with your exact car model before buying, just to be safe. If you do replace the sensor, clearing the code afterwards usually solves the problem for good. It’s a relatively straightforward fix compared to other potential causes, so it’s often the first thing people try when this code keeps coming back.
Hope this helps point you in the right direction!
I’ve actually come across the P13DF error on a few cars before. From what I understand, it’s usually linked to the NOx (Nitrogen Oxide) sensor. Even if your car drives perfectly fine and doesn’t show any other issues, this sensor is still part of the emissions and engine management system. That’s why the engine management light keeps coming back until the underlying issue is sorted. Sometimes this code can appear if the sensor is starting to fail or if it’s getting contaminated over time. In other cases, it can be caused by wiring issues or poor connections around the sensor, so it’s worth giving those a quick look too. I actually found this replacement NOx sensor: https://xenons4u.co.uk/mercedes-benz...ox-sensor.html. It’s worked for quite a few people, but I’d definitely recommend checking that it’s compatible with your exact car model before buying, just to be safe. If you do replace the sensor, clearing the code afterwards usually solves the problem for good. It’s a relatively straightforward fix compared to other potential causes, so it’s often the first thing people try when this code keeps coming back.
Hope this helps point you in the right direction!
