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P0703 2008 Ford Fusion Code - Brake Switch Performance

Quick Answer

The P0703 diagnostic trouble code for a 2008 Ford Fusion indicates an issue with the Brake Switch Performance. Common causes include Faulty brake switch, Loose or damaged wiring connected to the brake switch, Corrosion or dirt buildup affecting the brake switch contacts. 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
P0703 2008 Ford Fusion indicates Brake Switch Performance.
Common causes
Common causes include Faulty brake switch, Loose or damaged wiring connected to the brake switch, Corrosion or dirt buildup affecting the brake switch contacts.
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 11, 2024
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Code P0703 2008 Ford Fusion Description

The P0703 diagnostic trouble code for a 2008 Ford Fusion indicates an issue with the Brake Switch Performance. The brake switch, also known as the stoplight switch, plays a crucial role in the vehicle's braking system. It is responsible for sending a signal to the vehicle's electronic control module (ECM) when the brake pedal is pressed, which in turn activates the brake lights and allows the vehicle to shift out of park.

OBDII Code P0703 2008 Ford Fusion - Brake Switch Performance
P0703 2008 Ford Fusion Code - Brake Switch Performance

Common Causes of P0703 2008 Ford Fusion

  1. Faulty brake switch.
  2. Loose or damaged wiring connected to the brake switch.
  3. Corrosion or dirt buildup affecting the brake switch contacts.
  4. Issues with the brake pedal position sensor.
  5. Problems with the vehicle's ECM.

Symptoms of P0703 2008 Ford Fusion

  1. Brake lights not turning on when the brake pedal is pressed.
  2. Inability to shift out of park.
  3. Cruise control not working.
  4. ABS or traction control warning lights illuminated on the dashboard.
  5. Erratic behavior of the vehicle's transmission.

How to Fix P0703 2008 Ford Fusion

  1. Begin by locating the brake switch, which is typically located near the top of the brake pedal arm.
  2. Disconnect the wiring harness connected to the brake switch.
  3. Remove the old brake switch by unscrewing it from its mounting bracket.
  4. Install the new brake switch by securing it in place and reconnecting the wiring harness.
  5. Test the brake lights and ensure that the vehicle can shift out of park before reassembling any removed components.

Cost to Fix P0703 2008 Ford Fusion

The typical cost to repair a P0703 code related to the brake switch performance in a 2008 Ford Fusion can range from $50 to $150 for the part itself. Labor costs can vary depending on the shop rates and the time required for the repair, but it is generally estimated to be between $100 and $200. Overall, the total cost of addressing this issue can be expected to fall in the range of $150 to $350. It is advisable to check with local auto repair shops for a more accurate estimate based on specific factors such as location and vehicle specifics.

What does this mean?

Tech Notes for P0703 2008 Ford Fusion

Check if the stop light works with when the brake pedal is depressed if the brake lights are inoperative, replace or adjust the Brake Pedal Position (BPP) Switch (Stop Lamp Switch).

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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 P0703 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0703 in a 2008 Ford Fusion?

When the Brake Switch Performance code P0703 is present in a 2008 Ford Fusion, common symptoms may include issues with the vehicle's cruise control system, the inability to shift out of park, or the brake lights staying on constantly.

2. What are the possible causes of OBDII code P0703 in a 2008 Ford Fusion?

The most common causes of OBDII code P0703 in a 2008 Ford Fusion are a faulty brake light switch, a misadjusted brake light switch, damaged wiring or connectors related to the brake switch, or a problem with the brake pedal position sensor.

3. How can I diagnose the Brake Switch Performance code P0703 in my 2008 Ford Fusion?

To diagnose OBDII code P0703 in a 2008 Ford Fusion, start by checking the brake lights to see if they are functioning correctly. Inspect the brake light switch for any visible damage or misalignment. Using a diagnostic scanner, check for any stored trouble codes related to the brake switch performance.

4. Can a faulty brake switch cause the P0703 code in a 2008 Ford Fusion?

Yes, a faulty brake switch is a common cause of OBDII code P0703 in a 2008 Ford Fusion. If the brake switch is not functioning properly, it can trigger this code and lead to issues with the vehicle's shifting and brake light operation.

5. How can I repair the OBDII code P0703 in my 2008 Ford Fusion?

To repair OBDII code P0703 in a 2008 Ford Fusion, start by replacing the faulty brake light switch if necessary. Ensure that the new switch is properly adjusted and functioning correctly. Additionally, inspect and repair any damaged wiring or connectors related to the brake switch.

6. Are there any DIY tips for fixing the Brake Switch Performance code P0703 in a 2008 Ford Fusion?

If you are comfortable working on your vehicle, you can attempt to replace the brake light switch yourself to address OBDII code P0703 in a 2008 Ford Fusion. Make sure to follow the manufacturer's guidelines and use the correct tools for the job.

7. Can the Brake Switch Performance code P0703 in a 2008 Ford Fusion be a safety concern?

Yes, OBDII code P0703 in a 2008 Ford Fusion should be addressed promptly as it can affect the operation of critical safety systems such as the brake lights and the vehicle's ability to shift gears. Ignoring this code can pose a safety risk.

8. How long does it typically take to repair the OBDII code P0703 in a 2008 Ford Fusion?

The repair time for OBDII code P0703 in a 2008 Ford Fusion can vary depending on the cause of the issue and the availability of parts. In general, replacing the brake light switch and addressing any wiring issues can typically be done within a few hours.

9. Will resetting the OBDII code P0703 in a 2008 Ford Fusion make it go away permanently?

Resetting the OBDII code P0703 in a 2008 Ford Fusion may temporarily clear the code, but if the underlying issue, such as a faulty brake light switch, is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

10. Is it safe to continue driving my 2008 Ford Fusion with the Brake Switch Performance code P0703 present?

It is not recommended to continue driving your 2008 Ford Fusion with the OBDII code P0703 (Brake Switch Performance) present, as it can lead to issues with the vehicle's braking system and shifting capabilities. It is best to address the problem promptly to ensure safe operation of the vehicle.

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