Engine-Codes - Generic - U11C1

U11C1 - Reductant Control Module Received Implausible Data From ECM/PCM

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U11C1 Possible Causes

  • Faulty Diesel Exhaust Fluid (DEF) Dosing Control Unit
  • Diesel Exhaust Fluid Dosing Control Unit harness is open or shorted
  • Diesel Exhaust Fluid Dosing Control Unit circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How is the U11C1 code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the U11C1 code

Labor: 1.0

The cost to diagnose the U11C1 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U11C1 Meaning

The Diesel Exhaust Fluid (DEF) Dosing Control Unit is used to control the operation and monitoring of the Diesel Exhaust Fluid system. The DEF Dosing Control Unit is the central control for the aftertreatment diesel exhaust fluid dosing system, and handles the tank level sensing, tank temperature sensing, line heating, and tank heating. The DEF Dosing Control Unit shares information with the Powertrain Control Module (PCM) over the J1939 Data Link. The PCM will illuminate the MIL light after the diagnostics runs and fails for two consecutive trips. The PCM will turn off the MIL light when the monitor runs and passes in three consecutive key cycles. The Diagnostic Trouble Code (DTC) sets when the DEF Dosing Control Unit cannot interpret Data link messages from the Powertrain Control Module.

More Information

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Information for specific makes

  • U11C1 CHRYSLER Reductant Control Module Received Implausible Data From ECM/PCM
  • U11C1 DODGE Reductant Control Module Received Implausible Data From ECM/PCM
  • U11C1 JEEP Reductant Control Module Received Implausible Data From ECM/PCM
  • U11C1 RAM Reductant Control Module Received Implausible Data From ECM/PCM

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