Guest Blogger April 20, 2019 Auto Blog

A NOx sensor on a Mercedes Benz can be an exceptionally helpful device, and there’s no doubt about that. However, like many pieces of technology, it is prone to go wrong. Knowing what it is and how it can develop faults can be critical for making sure that you look after yourself and others.

With that in mind, we’re going to take a look at what the NOx sensor is, what can commonly go wrong for it, and what the different kinds of error messages you’re likely to encounter might be, so you’re ready for any problem.

What is a NOx Sensor?

We shall begin by going over what a NOx sensor is and how it can affect your vehicle. NOx stands for nitrogen oxide, and the sensor measures the levels which your vehicle puts out into the world. Typically, you will find these indicators in vans, but they can be put into cars as well depending upon the situation. These sensors are used to protect the environment from damage, and can help to prevent inefficiency of the engine.

Common Errors for Nox Sensors

There are a few different errors which can come up when trying to work with a NOx sensor and it is important to understand what can go wrong with your system.

Typically, what you’ll find is that the measuring sensor is broken. There’s a fault with the machine and it can’t detect the levels of nitrogen oxide that you’re releasing into the atmosphere. This means that you can’t protect the world around you in the same way, which isn’t ideal. You might also find that you’re having to deal with things like the sensor giving inaccurate readings or just refusing to work at all.

Thankfully, there’s a lot of codes around which you can use to try and make sure that you’re properly diagnosing your system. If you see any of the error codes labelled P229F62 P2202 U029E00 U029E U029D00 or U029D, then you are dealing with a failed Mercedes Benz A0009053603 part which is the upstream variant before a catalytic converter, which can be sourced via this link. Alternatively, you may find that you’re dealing with error codes P229F62 P2202 U029E00 U029E U029D00 and U029D, which refers to a failure of the Mercedes Benz A0009053503 part, which is the downstream variant after a catalytic converter, and is available via this link.

Overall, these are the different types of sensor that you can have for your Mercedes-Benz vehicle, as well as the common error codes which can be displayed for them. It is not easy to try and look after your vehicle as well as the environment, but people who manage to get this bit right will find that it becomes easy to keep everything safely running and in good working order. What you have to appreciate is that all the error codes point to the same problem, so when you’ve figured it out, it’s easy to deal with the issue.

Tags Mercedes Benz mercedes benz nox sensor NOx NOx sensor

By Mark Powell, Business Unit Director at Broughton Lubricants Working on a classic car is …

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