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Engine-Codes – Mercury – U2473 Mercury

U2473 Mercury Code - Unexpected Vehicle Speed

Quick Answer

The U2473 diagnostic trouble code (DTC) for Mercury vehicles indicates an unexpected vehicle speed. Common causes include Faulty speed sensor, Wiring or connection issues, Transmission or engine control module malfunction. 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
U2473 Mercury indicates Unexpected Vehicle Speed.
Common causes
Common causes include Faulty speed sensor, Wiring or connection issues, Transmission or engine control module malfunction.
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 18, 2024
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Code U2473 Mercury Description

The U2473 diagnostic trouble code (DTC) for Mercury vehicles indicates an unexpected vehicle speed. This code is typically triggered when the vehicle's onboard computer detects a discrepancy between the expected speed based on input from various sensors and the actual speed of the vehicle. This discrepancy can lead to a range of issues affecting the vehicle's performance and safety.

OBDII Code U2473 Mercury - Unexpected Vehicle Speed
U2473 Mercury Code - Unexpected Vehicle Speed

Common Causes of U2473 Mercury

  1. Faulty speed sensor
  2. Wiring or connection issues
  3. Transmission or engine control module malfunction
  4. Software glitches in the vehicle's computer system
  5. Mechanical issues affecting speed control

Symptoms of U2473 Mercury

  1. Sudden changes in vehicle speed without driver input
  2. Inaccurate speedometer readings
  3. Loss of cruise control functionality
  4. Check Engine Light illuminated
  5. Transmission shifting irregularities

How to Fix U2473 Mercury

  1. Diagnose the issue using a professional automotive scanner to pinpoint the exact cause of the unexpected vehicle speed.
  2. Inspect and test the speed sensors to determine if they are functioning correctly.
  3. Check the wiring and connections related to the speed sensors for any signs of damage or corrosion.
  4. Test the transmission and engine control modules for proper operation and reprogram if necessary.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix U2473 Mercury

The typical repair costs for addressing the U2473 code can vary depending on the specific cause of the issue. In general, the cost of parts such as speed sensors or control modules can range from $100 to $500, while labor costs can add an additional $100 to $300. Overall, the total repair cost for this issue may fall within the range of $200 to $800. However, it's important to note that these estimates are rough guidelines, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repairs needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.

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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 U2473 Mercury Code

1. What are the common symptoms of OBDII code U2473 (Unexpected Vehicle Speed) in a Mercury?

When this code is triggered, you may experience erratic speedometer readings, harsh shifting of gears, and potential loss of power in the vehicle.

2. What are the possible causes of OBDII code U2473 in a Mercury?

The code U2473 usually indicates a fault with the vehicle speed sensor, damaged wiring or connectors related to the sensor, or a malfunction in the vehicle's transmission system.

3. How can I diagnose the OBDII code U2473 in my Mercury?

Diagnosing code U2473 typically involves using an OBDII scanner to retrieve the code, checking the vehicle speed sensor for proper operation, inspecting the wiring for any damage, and testing the transmission system for issues.

4. Can a faulty vehicle speed sensor cause code U2473 in a Mercury?

Yes, a faulty vehicle speed sensor is a common cause of code U2473 in a Mercury. The sensor may be sending incorrect signals to the vehicle's computer, leading to unexpected vehicle speed readings.

5. Are there any simple repair tips for resolving OBDII code U2473 in a Mercury?

If the issue is related to a faulty vehicle speed sensor, replacing the sensor with a new, quality part and ensuring proper installation can often resolve the U2473 code in a Mercury.

6. Is it safe to continue driving my Mercury with OBDII code U2473 present?

It is not recommended to drive your Mercury with the U2473 code present, as it can lead to safety hazards due to inaccurate speed readings and potential transmission issues. It is best to address the problem promptly.

7. Can weather or road conditions trigger OBDII code U2473 in a Mercury?

While rare, extreme weather conditions or rough road conditions could potentially affect the vehicle speed sensor or related components, leading to the triggering of code U2473 in a Mercury.

8. How much does it typically cost to repair OBDII code U2473 in a Mercury?

The cost of repairing code U2473 in a Mercury can vary depending on the exact cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take it to a professional mechanic.

9. Will resetting the OBDII system clear the U2473 code in my Mercury?

Resetting the OBDII system may temporarily clear the U2473 code, but if the underlying issue (such as a faulty vehicle speed sensor) is not addressed, the code is likely to reappear once the problem is detected again.

10. Can code U2473 in a Mercury affect fuel efficiency?

Yes, since code U2473 can lead to transmission issues and erratic speedometer readings, it can potentially impact fuel efficiency in a Mercury by causing the engine to operate less efficiently.

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