Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Volvo V90 Cross CountryFACTORY OEM SERVICE PROCEDURE
NOX Reduction Control Module (NRCM) (4/266) [2018-2022]: Description
The NOx Reduction Control Module (NRCM) manages the urea injection system. This includes:
- Monitoring the level, pressure, temperature and concentration of the urea.
- Control the heating of the urea in cold climates.
- Pumping, dosing and injecting the urea.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.