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U0101

Overview

Code

U0101

Code Type

U

Code Class

U0

System

Network

Severity Level

High

Emissions Related

false

Drivability Impact

Major

Diagnostic Protocol

CAN

Freeze Frame Useful

false

Code Definition

Diagnostic trouble code U0101 indicates lost communication with the transmission control module (TCM)

Symptoms

Transmission stuck in limp mode

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Transmission network communication

Possible Causes

TCM power loss

Diagnostic Steps

1 Check TCM power and ground; 2 Inspect CAN lines

Drive Safety Notes

Gear shifting may be limited

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