AutoCodes – Buick – U019E Buick

U019E Buick 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 Buick 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 561

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

What does this mean?

What are the Possible Causes of the DTC U019E Buick?

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 Buick?

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 Buick 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 Buick Code

1. What does the OBDII code U019E mean on a Buick?

The U019E code indicates that the vehicle has lost communication with the Transmission Range Control Module (TRCM).

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

Symptoms may include transmission not shifting properly, warning lights on the dashboard, erratic gear selection, or the vehicle being stuck in a single gear.

3. What causes the U019E code to appear?

Common causes include damaged wiring, a faulty Transmission Range Control Module, corroded or loose electrical connectors, or issues with the CAN bus network.

4. Can I drive my Buick with a U019E code?

Driving with this code is not recommended, as it can lead to poor transmission performance and potentially damage other components.

5. How can I diagnose the U019E code on my Buick?

Start by inspecting the wiring and connectors around the TRCM for damage or corrosion. Use a scan tool to check for related codes and monitor CAN bus communication.

6. How do I fix the U019E code on a Buick?

Repairs may involve fixing or replacing damaged wiring, cleaning or securing electrical connectors, or replacing the faulty Transmission Range Control Module.

7. What tools are needed to troubleshoot the U019E code?

Youâ€™ll need a diagnostic scan tool capable of reading manufacturer-specific codes and monitoring the CAN bus network, as well as basic tools for inspecting wiring and connectors.

8. Is the U019E code specific to Buicks only?

No, the U019E code can appear in other vehicles as well, but the location and specifics of the Transmission Range Control Module may vary.

9. How much does it cost to repair a U019E code on a Buick?

Repair costs can range from $50 for minor wiring repairs to $1,000 or more if the Transmission Range Control Module needs replacement.

10. Can a low battery cause the U019E code on a Buick?

Yes, a weak or failing battery or charging system can disrupt communication with the TRCM and trigger this code. Always check the battery voltage first.