AutoCodes – Generic – U1059

U1059 Code - Invalid Or Missing Data For Transmission Control Module

Quick Answer

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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: U1059 indicates Invalid Or Missing Data For Transmission Control Module.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 27,628

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 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U1059 Description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of beginning serial data communication, the Diagnostic Trouble Code (DTC) is set.

OBDII Code U1059 - Invalid Or Missing Data For Transmission Control Module - AutoCodes.com — U1059 Code - Invalid Or Missing Data For Transmission Control Module

What does this mean?

What are the Possible Causes of the DTC U1059?

Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC U1059?

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 U1059 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.

Need more information about the U1059 code?

Need more information on how to fix the U1059 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1059 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1059 Ford — Invalid Or Missing Data For Transmission Control Module
U1059 Lincoln — Invalid Or Missing Data For Transmission Control Module
U1059 Mercury — Invalid Or Missing Data For Transmission Control Module

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 U1059 Code

1. What are the common symptoms of OBDII code U1059?

The common symptoms of OBDII code U1059 include issues with shifting gears, transmission slippage, poor fuel economy, and possibly a check engine light.

2. What can cause the OBDII code U1059 to appear?

The OBDII code U1059 can appear due to a faulty transmission control module, wiring issues, a defective transmission sensor, or a software malfunction.

3. How can I diagnose the OBDII code U1059?

Diagnosing the OBDII code U1059 involves using a diagnostic scanner to retrieve the code, checking for any related transmission trouble codes, inspecting the wiring and connectors, and testing the transmission control module and sensors.

4. Can I still drive my vehicle with the OBDII code U1059 present?

It is not recommended to drive your vehicle with the OBDII code U1059 present, as it can lead to further transmission damage and potentially unsafe driving conditions.

5. How can I repair the OBDII code U1059?

Repairing the OBDII code U1059 may involve replacing the faulty transmission control module, repairing or replacing damaged wiring, fixing any sensor issues, or updating the software.

6. Is it safe to reset the OBDII code U1059 and continue driving?

Resetting the OBDII code U1059 without addressing the underlying issue is not recommended, as the problem may persist and potentially cause more severe transmission issues down the line.

7. Can a DIY enthusiast fix the OBDII code U1059?

While some experienced DIY enthusiasts may be able to diagnose and repair the OBDII code U1059, it is recommended to seek professional help due to the complexity of transmission control module issues.

8. How much does it cost to repair the OBDII code U1059?

The cost to repair the OBDII code U1059 can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Will the OBDII code U1059 cause permanent damage to my vehicle?

Ignoring the OBDII code U1059 can lead to permanent damage to your vehicle's transmission system, resulting in costly repairs or even the need for a full transmission replacement.

10. How can I prevent the OBDII code U1059 from reoccurring?

To prevent the OBDII code U1059 from reoccurring, it is essential to perform regular maintenance on your vehicle, address any transmission issues promptly, and follow the manufacturer's recommended service schedule.