What's the deal with diesel engine DEF sensor downtime?

What’s the deal with diesel engine DEF sensor downtime?

The only thing worse than starting your vehicle and seeing warning lights appear on your dash is finding out about the problem while you’re on the road. As inconvenient as they are, these lit up symbols act as warnings that if things remain overlooked, the next destination for your truck will be the repair shop. 

Just like the cover of a book, however, these dashboard warning lights won’t provide you with substantial information and a proper diagnosis should be conducted as soon as possible. The detailed information on a telematics dashboard will help ensure the correct repair and prevent further damage, but running the test on outdated software could cause more problems than they solve. 

To avoid sidelining your trucks on the road, having up-to-date software versioning is a critical point for any fleet manager or owner. The outdated software could cause an engine derate due to the quality of sensor reading and this means a slow and time-consuming crawl to the nearest shop all thanks to a false confidence. 

Don’t forget to consider the downtime that will come with the repair. Due to the microchip shortage, it’s harder to obtain the components needed to put your trucks back on the road. In the hot months especially, it’s important to make sure that the information you’re receiving from software regarding sensor operations remains accurate as this is the most likely time a sensor will fail due to the increase in temperature. 

The ongoing effort towards preventative maintenance goes not only for the truck, but also the software and telematics dashboard collecting its data. Ensuring data is collected on up-to-date systems could mean the difference between a productive day and a not so productive day.

Fleet Equipment’s Data Center is sponsored by Noregon. Subscribe to our newsletter to catch every episode as we’ll be diving into use cases, talking with the data pros and making data usage approachable.

You May Also Like

The major differences between heavy-duty and medium-duty truck repair

A delivery truck that runs stop-and-start routes in the city is going to need its brakes checked more often than an on-highway truck.


You might think that repair and maintenance schedules are the same for heavy-duty and medium-duty trucks, but you would be wrong there. Different trucks are used for different applications, which means the preventative maintenance schedules, and the type of maintenance you do, won’t necessarily be the same. A delivery truck that runs stop-and-start routes in the city is going to need its brakes checked more often than an on-highway truck.

Handing off the wrench: Training the next gen of heavy-duty technicians

The ones sitting in today’s classrooms will be the ones servicing tomorrow’s trucks.

Preventing downtime with heavy-duty preventative maintenance

Using sophisticated algorithms, truck service technology is quickly approaching the point where it can offer customized repair suggestions.

Analyzing heavy-duty truck service benchmarks

Regular checks on engine health, tuning, and tire condition can help identify any potential issues and ensure optimal fuel usage.

Safeguarding fleet success through data security

A breach in security can cause some serious problems and the malware being used is getting even more sophisticated.

Other Posts

From the Show Floor: Combustion engines in the future, funding sustainable trucks

A new HD brand, an autonomous truck, a timeline for ICE technology, resources to help fleets decarbonize and more from ACT Expo.

Volvo answers questions about its new autonomous truck

Volvo gives additional details on its newly announced autonomous truck, and the technology behind it.

From the Show Floor: Electric truck technology, enforcing CARB regulations

How will CARB regulations be enforced? What is the state of current and future EV trucking technology? We ask experts to get answers for you.

The vital nature of multi-v belt systems

From the alternator to A/C, the multi-v belt uses a truck’s engine to operate crucial components. Here’s how to keep things running smoothly.