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U1477 Dodge Code - Implausible Paddle Shifter Data Received

Quick Answer

The U1477 diagnostic trouble code (DTC) for Dodge vehicles indicates that the Powertrain Control Module (PCM) has detected implausible data from the paddle shifters. Common causes include Faulty paddle shifter assembly, Wiring issues such as shorts or open circuits, Defective PCM. 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 Dodge indicates Implausible Paddle Shifter Data Received.
Common causes
Common causes include Faulty paddle shifter assembly, Wiring issues such as shorts or open circuits, Defective PCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code U1477 Dodge Description

The U1477 diagnostic trouble code (DTC) for Dodge vehicles indicates that the Powertrain Control Module (PCM) has detected implausible data from the paddle shifters. Paddle shifters are commonly found on vehicles equipped with automatic transmissions that allow the driver to manually shift gears without the need for a clutch pedal. When the PCM receives data from the paddle shifters that does not align with the expected parameters, it triggers the U1477 code.

OBDII Code U1477 Dodge - Implausible Paddle Shifter Data Received
U1477 Dodge Code - Implausible Paddle Shifter Data Received

Common Causes of U1477 Dodge

  1. Faulty paddle shifter assembly
  2. Wiring issues such as shorts or open circuits
  3. Defective PCM
  4. Software glitches in the transmission control module
  5. Water or corrosion damage to electrical components

Symptoms of U1477 Dodge

  1. Erratic shifting behavior
  2. Inability to shift gears using paddle shifters
  3. Transmission slipping
  4. Limp mode activation
  5. Illumination of the Check Engine Light

How to Fix U1477 Dodge

  1. Begin by conducting a visual inspection of the paddle shifter assembly and wiring harness for any visible damage or loose connections.
  2. Use a diagnostic scan tool to retrieve the specific details of the U1477 code and perform further testing to pinpoint the exact cause of the issue.
  3. Test the paddle shifters for proper functionality and check for any abnormal resistance in the wiring.
  4. If necessary, replace the faulty paddle shifter assembly, repair any damaged wiring, or reprogram the PCM to address software-related issues.
  5. Clear the DTC from the PCM's memory and test drive the vehicle to ensure the problem has been resolved.

Cost to Fix U1477 Dodge

The typical repair costs for addressing the U1477 code can vary depending on the specific cause of the issue. In general, replacing a faulty paddle shifter assembly or repairing wiring problems may cost between $200 to $500, including parts and labor. However, if the PCM needs to be replaced or reprogrammed, the total repair costs could range from $500 to $1000 or more. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

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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 U1477 Dodge Code

1. What are the common symptoms of OBDII code U1477 in a Dodge related to "Implausible Paddle Shifter Data Received"?

- Common symptoms include erratic shifting behavior, illuminated Check Engine Light, and disabled paddle shifter function.

2. What are some possible causes of OBDII code U1477 in a Dodge?

- Possible causes include faulty paddle shifter switch, wiring issues, damaged paddle shifter module, or a communication error within the system.

3. How can I diagnose the issue causing OBDII code U1477 in my Dodge?

- Diagnose the issue by checking the paddle shifter wiring for damage, testing the paddle shifter switch functionality, and using a diagnostic scan tool to analyze communication signals.

4. Is it safe to continue driving with OBDII code U1477 in a Dodge?

- While the vehicle may still be operable, it is recommended to address the issue promptly to prevent further damage or potential safety hazards.

5. Can I reset the OBDII code U1477 in my Dodge without addressing the underlying problem?

- Simply resetting the code without fixing the root cause will likely result in the code reappearing once the issue is encountered again.

6. How much does it typically cost to repair OBDII code U1477 in a Dodge?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing faulty components, repairing wiring, or reprogramming the paddle shifter module.

7. Are there any DIY repair tips for addressing OBDII code U1477 in a Dodge?

- DIY tips may include visually inspecting the paddle shifter wiring, ensuring proper connections, and checking for any visible signs of damage before seeking professional assistance.

8. Can weather or environmental factors contribute to triggering OBDII code U1477 in a Dodge?

- Extreme temperatures or moisture exposure can potentially affect the paddle shifter components and wiring, leading to communication errors and triggering the code.

9. How long does it typically take to repair OBDII code U1477 in a Dodge?

- The repair time can vary based on the complexity of the issue and availability of parts, but it may range from a few hours to a day in most cases.

10. Is it necessary to visit a dealership for repairs related to OBDII code U1477 in a Dodge?

- While a dealership may have specialized knowledge and tools, independent repair shops with experience in handling such issues can also effectively diagnose and repair the problem.

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