AutoCodes – Mercury – U1059 Mercury

U1059 Mercury 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 Mercury 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.

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Code Popularity 2,392

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

What does this mean?

What are the Possible Causes of the DTC U1059 Mercury?

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 Mercury?

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 Mercury 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 U1059 Mercury Code

1. What are common symptoms of OBDII code U1059 in a Mercury vehicle?

- Common symptoms include transmission shifting issues, harsh gear changes, and the transmission going into limp mode.

2. What does the OBDII code U1059 in a Mercury indicate?

- The code U1059 indicates that there is invalid or missing data for the Transmission Control Module (TCM).

3. What are possible causes of the U1059 code in a Mercury?

- Possible causes include a faulty TCM, damaged wiring or connectors related to the TCM, software issues, or a malfunctioning sensor.

4. How can I diagnose the U1059 code in my Mercury?

- Diagnosing the U1059 code usually involves using an OBDII scanner to read the code, checking the TCM and related components for any visible damage, and conducting a thorough inspection of the wiring harness and connectors.

5. Can I still drive my Mercury with the U1059 code present?

- It is not recommended to drive your vehicle with the U1059 code present, as it can lead to further damage to the transmission and potentially cause safety hazards.

6. How can I repair the U1059 code in my Mercury?

- Repairing the U1059 code may involve replacing the TCM, repairing or replacing damaged wiring, updating software, or addressing any sensor issues identified during the diagnostic process.

7. Can I reset the U1059 code in my Mercury using an OBDII scanner?

- While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring.

8. Is the U1059 code specific to Mercury vehicles?

- The U1059 code is not specific to Mercury vehicles and can be found in other makes and models as well.

9. How much does it typically cost to repair the U1059 code in a Mercury?

- The cost of repairing the U1059 code 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.

10. Are there any DIY repair options for the U1059 code in a Mercury?

- DIY repair options for the U1059 code may be limited, as it often requires specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.