U0107 high Severity

U0107: Lost Communication With Throttle Actuator Control Module

Significant loss of throttle control; vehicle may enter limp mode or be undrivable

Overview

U0107 throttle actuator control communication lost CAN bus PCM TAC module

Common Symptoms

  • Check Engine Light illuminated
  • Electronic throttle control warning light
  • Unresponsive throttle or no throttle response
  • Vehicle stuck in limp mode or reduced power
  • Erratic idling or reduced acceleration

Most Common Causes

Open or short in CAN bus wiring or circuit high

Loss of communication over CAN bus is primary trigger for U0107 across multiple sources

Faulty Throttle Actuator Control (TAC) module medium

Module may fail internally or due to corrosion, preventing communication

Poor power or ground to TAC module medium

Blown fuses, poor ground can interrupt module communication

Faulty PCM/ECM communication port or software issue low

Less common but possible if module misinterprets signals

Diagnostic Steps

  1. Scan for active and pending codes
    Expected: U0107 present, possibly with other network codes
    Interpretation: Confirms communication fault and identifies related errors
  2. Visually inspect CAN bus wiring and connectors between PCM and TAC
    Expected: No broken wires, no corrosion, secure connectors
    Interpretation: Damaged wiring/connectors often root cause
  3. Check fuses and power/ground to TAC module
    Expected: Correct voltage and solid ground
    Interpretation: Poor power/ground can simulate communication loss
  4. Use multimeter or oscilloscope to test CAN High/Low
    Expected: Proper resistances (~60 ohm loop) and clean signal waveform
    Interpretation: Validates CAN network integrity
  5. Attempt communication with the TAC module using scan tool
    Expected: Module communicates without error
    Interpretation: If communication possible, U0107 may be intermittent or memory-only

Repair Solutions

Repair or replace damaged CAN bus wiring/connectors medium
Estimated Cost: $50 - $300

Fix wiring harness faults to restore communication

Replace faulty TAC module hard
Estimated Cost: $300 - $1200

Module replacement often required if internal failure

Clean and secure grounds and power connections easy
Estimated Cost: $0 - $50

Simple grounding fixes can resolve communication errors

Update PCM/TAC software or reprogram modules medium
Estimated Cost: $100 - $250

Software issues may resolve communication faults

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Assuming throttle body mechanical failure instead of communication issue

Frequently Asked Questions

Can you explain the meaning of U0107?

The U0107 code stands for Lost Communication With Throttle Actuator Control Module. This generally indicates an issue with the Air Intake system.

Should I stop driving if I have U0107?

With a severity level of high, significant loss of throttle control; vehicle may enter limp mode or be undrivable

How do I know if I have code U0107?

You may experience the following: Check Engine Light illuminated, Electronic throttle control warning light, Unresponsive throttle or no throttle response.

Common triggers for the U0107 error

The most common causes are: Open or short in CAN bus wiring or circuit, Faulty Throttle Actuator Control (TAC) module, Poor power or ground to TAC module.

What is the price difference for fixing U0107?

Repair costs depend on the specific failure. A simple Clean and secure grounds and power connections replacement is relatively affordable ($0-$50), whereas a Replace faulty TAC module repair is more expensive, potentially reaching $1200.

Does U0107 affect Ford, Toyota, or Honda?

U0107 is not specific to any one brand. It can appear on Ford, Dodge, Toyota, Honda, Jeep, and other vehicles.

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