Reductant Control Module System Voltage

Common symptoms

What you'll notice

• Check the battery voltage and ensure it is within the specified range for the reductant control module.
• Inspect the wiring and connections of the reductant control module system to identify any loose or damaged components.
• Reset the reductant control module system by disconnecting the battery for a few minutes and then reconnecting it.
• Perform a software update or reprogramming for the reductant control module system to ensure it is running with the latest version.
• Replace the reductant control module if all other solutions fail to resolve the issue.

Common causes

Most likely first

1. Malfunctioning Reductant Control Module (RCM)
2. Low voltage in the Reductant Control Module system
3. Faulty wiring or connections in the Reductant Control Module system
4. Sensor issues related to the Reductant Control Module system
5. Software glitch or error in the Reductant Control Module system

How to diagnose & fix

Work through it in order

1. Check engine light illuminates on the dashboard
2. Decreased engine performance and power
3. Poor fuel efficiency
4. Difficulty starting or stalling
5. Unusual exhaust odor or smoke