Reductant Control Module Internal Temperature Sensor Circuit Low

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. Malfunctioning or faulty reductant control module
2. Short circuit or wiring issue in the internal temperature sensor circuit
3. Faulty temperature sensor
4. Defective temperature sensor connector or wiring connection

How to diagnose & fix

Work through it in order

1. Check engine light is illuminated on the dashboard
2. Decreased engine performance and power
3. Increased fuel consumption
4. Difficulty starting the engine
5. Poor emission levels