The Vito W447 is experiencing a malfunction with its exhaust pressure sensor.

[Jacob_Evans2001]

I am experiencing sporadic malfunctions with my W447, which is a 111cdi model from 2017. The engine light sometimes illuminates and then turns off. Upon connecting the device, I have seen error code P0471, indicating a malfunction in the exhaust pressure sensor.
The issue first occurred in the morning when the external temperature was around -4 degrees. The engine emitted a distressing noise and the van exhibited complete lack of power until the engine reached operating temperature, at which point it returned to its usual state.
Currently, it is operating well, but, this recurring error continues to manifest and subsequently resolve itself.
Has anybody experienced this issue, and if so, was it only due to a malfunctioning sensor?

Thank you.

[MBcarOWNER]

The sensor is often located in close proximity to the EGR valve. Simple to replace. The approximate cost at MB is about £50.

This is an often encountered problem, to be honest.

One possible solution is to immerse the end in Mr. Muscle or use a carbon cleanser.

[Jacob_Evans2001]

Thank you, I will attempt that!

[Jacob_Evans2001]

I just visited Mercedes and they quoted a price of £159 for the sensor. Insane. I will attempt to clean it first and thereafter evaluate my alternatives.

[Hunger_for_love]

The pressure sensor on my W639 failed prematurely. Subsequently, one of the two temperature sensors (one located before the DPF and the other after) had to be extracted by drilling. Both of those actions immediately triggered a permanent limp state and activated the Engine Malfunction Light (EML). However, if the issue is sporadic, attempting a cleaning procedure may be worth considering.

[Jacob_Evans2001]

Fortunately, the vehicle did not enter limp mode. However, upon first occurrence, it had a complete loss of power and emitted an engine noise like that of a bag of hammers. This is the eleventh malfunction experienced within a span of 10 months of owning the vehicle! The mileage is 78,000 km.
Have you completed the task at Mercedes? Euro components provide a sensor for a price of £100, however, it is uncertain if it is fully compatible. Indeed, I will attempt the clean option first.

[Hunger_for_love]

Initially, the crankshaft position sensor malfunctioned, and subsequently, the exhaust pressure sensor also had a failure. First, the fuel pressure sensor is addressed, followed by the EGR valve, and finally the mass airflow sensor. Additionally, the exhaust manifolds (specifically for the 3.0 V6 engine) experienced delamination, resulting in the complete failure of the turbocharger. The instrument cluster malfunctioned. That mileage range spanned from around 75,000 to 95,000 miles. I first brought my vehicle to a reputable local shop, but unfortunately, they struggled for a duration of two weeks attempting to resolve the issue with the EGR valve. Regrettably, their diagnostic equipment was unable to effectively eliminate the fault codes. Consequently, I decided to transfer my vehicle to an authorised dealer for further assistance. Although they were not much more costly, they were considerably farther distant. In the end, they proved to be quite helpful and provided me with a substantial discount on the new manifolds and turbo, which required the engine to be removed. Additionally, they also offered a discount on the instrument cluster, which a specialist attempted to fix but ultimately abandoned. Currently, I am located in Shropshire and the closest dealer is a 45-minute journey in both directions. Therefore, I will have to resort to using a local garage once again. Knock on wood Lately, I have experienced satisfactory conditions with just a few issues related to glowplugs, plug relay, glowplug circuit 'mega fuse', and the exhaust centre and rear boxes. Currently at a mileage of 160,000 kilometres. Fortunately, it is just EE4, meaning that AdBlue is not required.

[Jacob_Evans2001]

I am scheduling a significant service for my vehicle within the next few weeks. The cost they are charging, £345, seems reasonable. I have always opted for independent garages rather than relying on big dealers for service. Mercedes should thoroughly assess the performance and condition of the vehicle. Additionally, it serves as a more compelling factor for sales. My vehicle is equipped with AdBlue, and I have already encountered issues related to it.

[Hunger_for_love]

In my experience, the MB commercial dealers are satisfactory. However, the main drawback I encountered with the one I visited in Reading was their high level of bookings, which resulted in considerable waiting times for workshop appointments. I am certain that they operated continuously, 24 hours a day, 7 days a week. However, it is evident that the major fleet clients were given preferential treatment.

In addition, the prices of MB components and accessories were rather reasonable. I purchased a set of front and centre rubber mats for my Dualiner at a very low price of £30. Individuals would be willing to spend double the amount for an unbranded item on eBay and see it as a good deal.

Interestingly, the nearby MB vehicle dealership, located about one mile from my home, declined to sell me a paint touch up pen in the colour Jasper Blue metallic, which is often used on several cars. Their refusal was based on their policy of not providing components for 'commercials'.