AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Scion - U0101 Scion

U0101 Scion Code - Lost Communication with Transmission Control Module

- Code Popularity: 3,595 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC U0101 Scion?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module harness is open or shorted
  • Transmission Control Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
⚠ Does your Scion have Safety Recalls? → Check here

How to Fix the DTC U0101 Scion?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for U0101 Scion Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0101 Scion code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code U0101 Scion Description

The Transmission Control Module (TCM) and Engine Control Module (ECM) perform 2-way communications with each other via the Controller Area Network (CAN). The TCM sends signals to the ECM concerning required engine rpm, required engine torques, warning indicators in the combination meter, DTCs, and other data. The ECM sends signals to the TCM concerning engine rpm, opening angles of the throttle valve, temperature of intake air, the temperature of engine coolant, engine torques, and other data. If the TCM cannot communicate with the ECM, the TCM will conclude that there is a malfunction in the CAN system, illuminate the MIL, and set a DTC.

OBDII Code U0101 Scion - Lost Communication with Transmission Control Module  - AutoCodes.com
U0101 Scion Code - Lost Communication with Transmission Control Module

Need More Information on the Code?

Need more information on how to fix the U0101 Scion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0101 Scion code diagnosed by a professional: Find a repair shop in your area

Code U0101 Scion comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U0101 Scion code? Have you replaced any parts?
Any information is appreciated. Thanks