2011 Isuzu NQR 4 Cyl Diesel with engine code P20C9, what is it and what does it do?

Question

diesel exhaust fluid tank was contaminated with diesel fuel code p20c9 is a hard code.
it refers to the reluctant control module. what is the reluctant control module, what does it operate? what is needed to repair this code.

Answer 1

• Check Diesel Exhaust Fluid (DEF) level and condition
• Faulty Nitrogen Oxide (NOX) Sensor(s)
• Faulty Reductant Control Module
• Reductant Control Module harness is open or shorted
• Reductant Control Module circuit poor electrical connection

P20C9 Isuzu Code - Diesel Exhaust Fluid Control Module Requested MIL Illumination
Read more: https://www.autocodes.com/p20c9_isuzu.html