AutoCodes – Ford – P0503 2003 Ford F150

P0503 2003 Ford F150 Code - Vehicle Speed Sensor Intermittent

Quick Answer

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. 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 2003 Ford F150 indicates Vehicle Speed Sensor 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 2,394

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0503 2003 Ford F150 Description

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the Engine Control Module (ECM). The ECM determines the vehicle speed based on the frequency of these pulse signals.

OBDII Code P0503 2003 Ford F150 - Vehicle Speed Sensor Intermittent - AutoCodes.com — P0503 2003 Ford F150 Code - Vehicle Speed Sensor Intermittent

What does this mean?

What are the Possible Causes of the DTC P0503 2003 Ford F150?

Faulty Vehicle Speed Sensor
Vehicle speed sensor harness or connectors is open or shorted
Vehicle speed sensor circuit poor electrical connection
Damaged VSS or driven gears
After market add-on
Faulty Engine Control Module (ECM)

How to Fix the DTC P0503 2003 Ford F150?

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 does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0503 2003 Ford F150 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 P0503 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P0503 on a 2003 Ford F150?

- Common symptoms include erratic speedometer readings, cruise control issues, and intermittent stalling.

2. What is the likely cause of an intermittent Vehicle Speed Sensor (VSS) error on a 2003 Ford F150?

- The likely cause of a P0503 code is a faulty or damaged Vehicle Speed Sensor.

3. How can I diagnose a Vehicle Speed Sensor issue on my 2003 Ford F150?

- You can diagnose a VSS issue by checking the sensor for physical damage, ensuring proper connection, and using a multimeter to test for continuity and voltage.

4. Can a dirty or malfunctioning wheel speed sensor trigger a P0503 code on a 2003 Ford F150?

- Yes, a dirty or malfunctioning wheel speed sensor can sometimes trigger a P0503 code due to its impact on the vehicle speed signal.

5. What are some repair tips for fixing a Vehicle Speed Sensor Intermittent error on a 2003 Ford F150?

- Repair tips include cleaning connectors, replacing the VSS if necessary, and ensuring proper installation to resolve the issue.

6. Is it safe to continue driving a 2003 Ford F150 with a P0503 code present?

- It is not recommended to drive the vehicle with a P0503 code as it can lead to inaccurate speed readings and potentially affect the vehicle's performance.

7. Can a P0503 code on a 2003 Ford F150 be a result of wiring issues?

- Yes, wiring issues such as damaged wires, shorts, or poor connections can also trigger a P0503 code.

8. How much does it typically cost to repair a Vehicle Speed Sensor Intermittent issue on a 2003 Ford F150?

- The cost of repairing a P0503 code can vary depending on the specific cause, but it may range from $100 to $300 for parts and labor.

9. Will resetting the OBDII code clear the P0503 error on a 2003 Ford F150?

- Resetting the OBDII code may temporarily clear the error, but if the underlying issue with the Vehicle Speed Sensor persists, the code is likely to reappear.

10. Can a DIY enthusiast with basic mechanical skills fix a P0503 code on a 2003 Ford F150?

- Yes, a DIY enthusiast with basic mechanical skills can attempt to diagnose and repair a P0503 code by following repair guides and using the right tools.