Engine-Codes - Ram - U11D1 RAM

U11D1 RAM - Engine Speed Message Rationality

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

U11D1 RAM Possible Causes

  • Faulty Powertrain Control Module (PCM)
  • Check Body Control Module (BCM) Codes
  • Faulty Transmission Control Module (TCM)

How is the U11D1 RAM 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 U11D1 RAM code

Labor: 1.0

The cost to diagnose the U11D1 RAM 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)

U11D1 RAM Meaning

This diagnostic checks the validity, availability and rationality of the engine speed signal which is sent by the Powertrain Control Module (PCM) via a Controller Area Network (CAN) message. The diagnostic checks the validity by performing a CRC and message counter check to be sure the engine speed signal is continuously updated by the PCM and that it has a valid value. The diagnostic also checks the availability by checking the received value is not equal to the Signal Not Available (SNA) default value. Then the diagnostic checks the rationality by comparing the received engine speed to the odd or even clutch speed and to the odd or even input shaft speed. The clutch speed is measured directly from the clutch speed sensor and the input shaft speed is calculated based upon the driveline speed multiplied by the actual gear ratio. Any reference to odd or even is directly related to the actual odd or even gear engaged.

More Information

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