You Do Know Most Everything In America Is Delivered By Diesel Trucks...,

In talks with my homie who just wrapped up a ten year stint with YRC, he tells me that most all the Diesel Exhaust Fluid (DEF) Level Sensors are made in Malaysia, and the factory is shut down there, and this is a part which needs to be replaced about every year or so, and an ungodly amount of big rigs are down for lack of this part. The same sensor is used on buses and RV’s, which are also down for the count. 

Read some of the stories from RV’ers in the second link, to give you an idea of all of the sudden ‘you ain’t going nowhere’ sagas.  He also mentioned there are hardly any new big rigs for sale, similar to the new car shortage. Another friend went to a Honda dealer just across State Line and related that they had a mere 13 new cars for sale.

trucknews |  Fleet maintenance teams are struggling to source many of the truck parts they need as suppliers face shortages of commodities from microchips to rubber.

“It’s really starting to dribble down into common parts,” said Darry Stuart of DWS Fleet Management, during an online Fleet Talk presentation for the spring meeting of the American Trucking Association’s Technology and Maintenance Council (TMC).

The emerging rubber shortage alone could affect the availability and pricing of everything from tires to O-rings, added TMC executive director Robert Braswell.

Several reports have identified challenges including China’s recent stockpiling of natural rubber, as well as flooding and disease that are affecting rubber trees themselves.

But the shortages are not limited to parts alone. While South Shore Transportation maintenance director Kevin Tomlinson admits it’s difficult to source wood for trailer floors, he is facing lengthy waits for new trailers themselves.

“It’s a perfect storm of build and parts,” Tomlinson said, referring to the surging market demand that has aligned with the material shortages.

Industry analysts at FTR recently reported that U.S. trailer manufacturers are almost booked solid for the remainder of 2021 and have yet to open 2022 order boards because they’re uncertain about material and component costs.

rvtravel |  Most current USA-produced diesel engines are equipped with federal government-required devices that reduce nitrogen oxide tailpipe emissions.

So what does that have to do with anything?

A major way these emissions are controlled is by injecting DEF into exhaust gases. The DEF helps convert nitrogen oxide, an air pollutant, into nitrogen and oxygen. Both of these elements are found in the air we breathe and, in themselves, are harmless. A monitoring system ensures this process goes as planned.

How does the DEF monitor work? 

To ensure the DEF in a vehicle system is effective, a monitoring system checks, among other things, its quality, quantity, and temperature. The complete monitoring system is made up of various parts and is commonly called a “DEF head.” If this system determines the DEF isn’t up to standard (or has run out), the DEF head sends a signal to the engine computer warning of the trouble.

The engine control computer, on receiving this signal, turns on a dash warning light. At this point, a sort of “clock” begins a countdown. For many users, after 100 miles or so the engine is “de-rated,” or slowed down to as low as five miles per hour. It’s a sure inducement to get the rig to a repair shop.

So why is de-rating a problem?

If your motorhome or truck is de-rated, you get nowhere fast. If your de-rate happens while traveling down a high-speed roadway, the chances of a rear-end collision from a faster rig are increased. Enter the human toll, not just from a real traffic accident, but the mental stress of worrying about it.

Why not just get the problem fixed and keep on going?

Like so many modern products, DEF heads contain silicon chip microprocessors. These are the culprits that are causing the problem – they’re failing. The chips are very specific in design, and require the appropriate replacements. But just as the auto industry is shutting down production lines due to the worldwide shortage of microchips, DEF head manufacturers are likewise plagued. Many RVers are being told replacement DEF heads could be months away. Meanwhile, their RVs sit immobile and useless. The human toll here is real.

If there aren’t microchips to fix the problem, can’t something else be done?

A temporary “fix” exists. While the EPA (Environmental Protection Agency) requires the DEF monitoring system, it recognizes some “essential” services can’t be stopped. For example, emergency vehicles simply can’t be de-rated, lest those rigs be put out of service. An allowance has been made to keep the DEF monitoring systems in place. They warn of bad DEF, but don’t de-rate the engines. If the EPA were to allow reprogramming of engine control computers in RVs in this same way, RVers could get on down the road.