AutoCodes – Ford – P0503 2007 Ford Fusion

P0503 2007 Ford Fusion Code - Vehicle Speed Sensor 'A' Intermittent

Quick Answer

Indicates poor or noisy VSS performance. Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor 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: P0503 2007 Ford Fusion indicates Vehicle Speed Sensor 'A' Intermittent.
Common causes: Common causes include Faulty Vehicle Speed Sensor, Vehicle speed sensor harness or connectors is open or shorted, Vehicle speed sensor 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 1,981

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0503 2007 Ford Fusion Description

Indicates poor or noisy VSS performance. Vehicle speed data is received from either the VSS, the transfer case speed sensor (TCSS), or the anti lock brake system (ABS) control module.

OBDII Code P0503 2007 Ford Fusion - Vehicle Speed Sensor 'A' Intermittent - AutoCodes.com — P0503 2007 Ford Fusion Code - Vehicle Speed Sensor 'A' Intermittent

What does this mean?

What are the Possible Causes of the DTC P0503 2007 Ford Fusion?

Faulty Vehicle Speed Sensor
Vehicle speed sensor harness or connectors is open or shorted
Vehicle speed sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0503 2007 Ford Fusion?

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 P0503 2007 Ford Fusion 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 P0503 2007 Ford Fusion code?

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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 P0503 2007 Ford Fusion Code

1. What are common symptoms of OBDII code P0503 on a 2007 Ford Fusion?

- Common symptoms include erratic or non-functioning speedometer, issues with cruise control, and potential transmission shifting problems.

2. What does the OBDII code P0503 'Vehicle Speed Sensor 'A' Intermittent' indicate on a 2007 Ford Fusion?

- This code indicates that the vehicle speed sensor 'A' is sending intermittent or erratic signals to the engine control module (ECM).

3. What are possible causes of OBDII code P0503 on a 2007 Ford Fusion?

- Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's alignment or mounting.

4. How can I diagnose the cause of OBDII code P0503 on my 2007 Ford Fusion?

- Diagnose by performing a visual inspection of the vehicle speed sensor and its wiring, testing the sensor's output using a multimeter, and checking for any related trouble codes.

5. Can OBDII code P0503 on a 2007 Ford Fusion be repaired at home?

- Depending on the cause, repairing this code at home may be possible by replacing the faulty vehicle speed sensor or repairing damaged wiring. However, professional diagnosis may be needed for more complex issues.

6. Will driving with OBDII code P0503 on a 2007 Ford Fusion cause further damage?

- Continuously driving with this code may lead to inaccurate speedometer readings, potential transmission issues, and negatively impact fuel economy. It is advisable to address the issue promptly.

7. How much does it typically cost to repair OBDII code P0503 on a 2007 Ford Fusion?

- The cost of repair can vary based on the cause of the code and whether it is done at a dealership, independent mechanic, or DIY. Generally, replacing a vehicle speed sensor can cost between $100 to $300.

8. Can a malfunctioning vehicle speed sensor lead to other problems in a 2007 Ford Fusion?

- Yes, a malfunctioning vehicle speed sensor can cause incorrect shift points in the transmission, affect fuel efficiency, and impact the proper functioning of the vehicle's speed-related systems.

9. Are there any temporary fixes for OBDII code P0503 on a 2007 Ford Fusion?

- Temporary fixes like resetting the trouble codes or clearing the ECM memory may temporarily remove the code, but the underlying issue causing P0503 will likely need to be addressed for a permanent solution.

10. How important is it to address OBDII code P0503 on a 2007 Ford Fusion promptly?

- It is important to address this code promptly to ensure accurate speed readings, proper transmission operation, and overall vehicle performance. Ignoring the issue can lead to further complications.