AutoCodes – Generic – U1477

U1477 Code - Implausible Paddle Shifter Data Received

Quick Answer

The purpose of the diagnostic is to monitor the Controller Area Network (CAN) BUS, the transmitted messages on the CAN BUS and the validity of the CAN signals. Common causes include Check for Steering Control Module (SCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted. 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: U1477 indicates Implausible Paddle Shifter Data Received.
Common causes: Common causes include Check for Steering Control Module (SCM) codes, Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted.
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 16,770

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 May 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1477 Description

The purpose of the diagnostic is to monitor the Controller Area Network (CAN) BUS, the transmitted messages on the CAN BUS and the validity of the CAN signals. The Diagnostic Trouble Code (DTC) sets when the Transmission Control Module (TCM) detects an incorrect signal ID from the Steering Control Module (SCM).

OBDII Code U1477 - Implausible Paddle Shifter Data Received - AutoCodes.com — U1477 Code - Implausible Paddle Shifter Data Received

What does this mean?

What are the Possible Causes of the DTC U1477?

Check for Steering Control Module (SCM) codes
Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC U1477?

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 U1477 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 U1477 code?

Need more information on how to fix the U1477 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1477 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U1477 Chrysler — Implausible Paddle Shifter Data Received
U1477 Dodge — Implausible Paddle Shifter Data Received
U1477 Jeep — Implausible Paddle Shifter Data Received
U1477 RAM — Implausible Paddle Shifter Data Received

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 U1477 Code

1. What are common symptoms of OBDII code U1477?

- Common symptoms include issues with the paddle shifters not responding correctly, erratic shifting behavior, and warning lights on the dashboard.

2. What can cause the OBDII code U1477 to trigger?

- This code is often triggered by communication errors between the paddle shifter module and other vehicle systems, such as the transmission control module.

3. How serious is the Implausible Paddle Shifter Data Received code?

- While the code itself may not cause immediate drivability issues, it can lead to incorrect shifting behavior, potentially affecting driving performance and safety.

4. How can I diagnose the cause of code U1477?

- Diagnosing this code typically involves checking the paddle shifter system for faults, inspecting wiring and connections, and using a diagnostic scanner to retrieve specific error codes.

5. Can a DIY enthusiast repair the U1477 code?

- Depending on the underlying cause, some DIY enthusiasts may be able to repair this code by addressing wiring issues, replacing faulty components, or resetting the system.

6. Is it safe to continue driving with code U1477 present?

- It is not recommended to drive with the U1477 code active, as it can lead to unpredictable shifting behavior and potential safety hazards on the road.

7. How much does it typically cost to repair OBDII code U1477?

- The cost of repairing code U1477 can vary depending on the cause of the issue, but it may involve expenses for diagnostic work, parts replacement, and labor.

8. Can resetting the OBDII system clear code U1477?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return.

9. Are there any recalls related to OBDII code U1477?

- It's advisable to check with the vehicle manufacturer or authorized dealerships to see if there are any recalls or technical service bulletins related to code U1477 for your specific vehicle model.

10. What should I do if I encounter code U1477 repeatedly despite repairs?

- If code U1477 keeps reoccurring even after repairs, it may be necessary to seek professional help from a certified mechanic or dealership to thoroughly diagnose and address the issue.