Reductant Control Module Internal Temperature Sensor Circuit

Common symptoms

What you'll notice

• Check the reductant control module connections and wiring for any loose or damaged components.
• Test the internal temperature sensor using a multimeter to ensure it is functioning correctly.
• Replace the reductant control module internal temperature sensor if it is determined to be faulty.
• If all else fails, consider replacing the entire reductant control module, as it may be experiencing internal malfunctions that cannot be repaired.

Common causes

Most likely first

1. Faulty reductant control module internal temperature sensor
2. Wiring or connector issue with the reductant control module internal temperature sensor

How to diagnose & fix

Work through it in order

1. Check engine light illuminates
2. Decreased engine performance or power
3. Poor fuel efficiency
4. Difficulty starting the vehicle
5. Increased emissions