What to do when SCR shows AdBlue failure?

Lower urea concentration or contaminated AdBlue are not the only reasons which can lead to SCR failure. The SCR system can stop working due various other reasons such as:

a. AdBlue injector: Injector seized or defective. It is no longer possible to inject Adblue into the system.

b. The Diesel Oxidation Catalyst (DOC): Burned, damaged or melted, it no longer allows optimized operation of the exhaust gas after-treatment system and little over the long term clogging the particulate filter since regenerations are no longer carried out.

c. Diesel Particulate filter (DPF): Clogged due to various causes. DOC catalyst problem, short trips too frequent and automatic regeneration not accomplished, there are multiple causes that can put your vehicle in power restriction.

d. Selective Catalytic Reduction (SCR) & Ammonia Slip Catalyst (ASC): Failure of the SCR catalyst, blocked or physically destroyed. NOx sensors can also cause SCR incidents managed by the vehicle’s ACM control module.