AutoCodes – Cadillac – U019E Cadillac

U019E Cadillac Code - Lost Communication With Transmission Range Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Transmission Range Control Module, Transmission Range Control Module harness is open or shorted, Transmission Range Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U019E Cadillac indicates Lost Communication With Transmission Range Control Module.
Common causes: Common causes include Faulty Transmission Range Control Module, Transmission Range Control Module harness is open or shorted, Transmission Range Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 510

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U019E Cadillac Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Transmission Range Control Module has not been received.

OBDII Code U019E Cadillac - Lost Communication With Transmission Range Control Module - AutoCodes.com — U019E Cadillac Code - Lost Communication With Transmission Range Control Module

What does this mean?

What are the Possible Causes of the DTC U019E Cadillac?

Faulty Transmission Range Control Module
Transmission Range Control Module harness is open or shorted
Transmission Range Control Module circuit poor electrical connection

How to Fix the DTC U019E Cadillac?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U019E Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U019E Cadillac Code

1. What does OBDII code U019E mean on a Cadillac?

Code U019E indicates a lost communication issue between the Transmission Range Control Module and other vehicle systems.

2. What are the common symptoms of code U019E on a Cadillac?

Symptoms may include transmission not shifting properly, erratic gear behavior, or the vehicle stuck in limp mode.

3. What causes code U019E on a Cadillac?

Common causes include faulty wiring, damaged connectors, a malfunctioning Transmission Range Control Module, or network communication issues.

4. Can a weak battery cause code U019E on a Cadillac?

Yes, a weak or failing battery can disrupt communication between modules, potentially triggering this code.

5. How is code U019E diagnosed on a Cadillac?

Diagnosis typically involves checking the wiring and connectors for damage, scanning the network for communication issues, and testing the Transmission Range Control Module.

6. Can code U019E cause transmission problems on a Cadillac?

Yes, communication loss with the Transmission Range Control Module can result in improper transmission function or limp mode.

7. How do you fix code U019E on a Cadillac?

Repairs may involve replacing damaged wiring, repairing connectors, reprogramming modules, or replacing the Transmission Range Control Module if necessary.

8. Is code U019E related to other transmission codes on a Cadillac?

It can be linked to other transmission-related codes if communication issues affect multiple modules in the vehicle.

9. Can code U019E be caused by water damage?

Yes, water intrusion into connectors or wiring can lead to communication failures and trigger this code.

10. Will clearing code U019E fix the issue permanently?

Clearing the code may temporarily remove it, but the underlying communication issue must be resolved to prevent it from returning.

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