AdBlue Issues

AdBlue - Emissions Fault

AdBlue is a solution made for emissions control, by reducing nitrogen oxide emissions in diesel engines. It’s a liquid, similar in appearance to water, and is sprayed into the exhaust before it leaves the machine.

Proper handling is essential to avoid any AdBlue-related problems. It’s always advisable to follow manufacturer instructions, so take note of these prior to handling. AdBlue should be stored in a cool, dry location out of direct sunlight, and preferably indoors in stainless steel or plastic containers.

Absolute purity is essential for AdBlue to do its job best, making it vulnerable to contamination.

Contaminants can easily get into the fluid through the tank cap area, which can lead to damage and consequently long, unplanned downtime for the machine.An indicator that your AdBlue may be contaminated is an uptick in AdBlue consumption, a selective catalytic reduction (SCR) system malfunction, or quite simply, the engine shuts down.

Although relatively simple, this system is very sensitive and delicate. Some of the common faults include:

  • in-tank heater element, which burns out. The only solution is replacing it with a new one.
  • injector and connecting tubing clogged up. As this system works only at high exhaust temperatures, urea solution can crystallize if you have frequent short journeys.
  • NOx sensor can break or give false readings.

If there is a problem with AdBlue system, your car will be limited to a number of starts or kilometres driven before it is not possible to restart it.

It is very important to deal with any issues regarding the AdBlue system without delay.