AutoCodes – Mercury – P0703 Mercury

P0703 Mercury Code - Brake Switch Performance

Quick Answer

The Brake Pedal Position (BPP) switch is sometimes referred to as the stop lamp switch. Common causes include Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch), Misadjusted Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted. 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 Mercury indicates Brake Switch Performance.
Common causes: Common causes include Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch), Misadjusted Brake Pedal Position Switch, Brake Pedal Position Switch harness is open or shorted.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 757

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 Jul 13, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0703 Mercury Description

The Brake Pedal Position (BPP) switch is sometimes referred to as the stop lamp switch. The BPP switch provides a signal to the Powertrain Control Module (PCM) indicating the brakes are applied. The BPP switch is normally open and mounted on the brake pedal support. The Powertrain Control Module monitors the BPP switch. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module did not receive a BPP switch input.

OBDII Code P0703 Mercury - Brake Switch Performance - AutoCodes.com — P0703 Mercury Code - Brake Switch Performance

What does this mean?

What are the Possible Causes of the DTC P0703 Mercury?

Faulty Brake Pedal Position (BPP) Switch (Stop Lamp Switch)
Misadjusted Brake Pedal Position Switch
Brake Pedal Position Switch harness is open or shorted
Brake Pedal Position Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0703 Mercury?

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

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).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0703 Mercury 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 P0703 Mercury code?

Need more information on how to fix the P0703 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0703 Mercury code diagnosed by a professional: Find a repair shop in your area

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 Mercury Code

1. What are the common symptoms of OBDII code P0703 in a Mercury related to brake switch performance?

- Common symptoms include the inability to shift out of park, intermittent or complete loss of brake lights, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P0703 in a Mercury vehicle?

- The code P0703 in a Mercury is usually triggered by a malfunctioning brake light switch, faulty wiring related to the switch, or a problem with the shift interlock solenoid.

3. How can I diagnose the issue causing OBDII code P0703 in my Mercury?

- To diagnose the problem, you can start by checking the brake light operation, inspecting the brake light switch and its wiring for any damage, and testing the shift interlock solenoid for proper function.

4. Can a malfunctioning brake switch affect the driving performance of my Mercury?

- Yes, a malfunctioning brake switch can affect the driving performance of your Mercury by preventing you from shifting out of park or causing issues with the brake lights, which are important for safety.

5. Are there any simple repair tips for fixing OBDII code P0703 in a Mercury?

- Simple repair tips include checking and adjusting the brake light switch position, replacing the brake light switch if it is faulty, and ensuring all wiring connections are secure and free of corrosion.

6. Is it safe to continue driving my Mercury with OBDII code P0703 related to brake switch performance?

- It is not recommended to drive your Mercury with OBDII code P0703, as it can impact the vehicle's safety systems and overall performance. It is best to address the issue promptly.

7. How much does it typically cost to repair OBDII code P0703 in a Mercury at a repair shop?

- The cost of repairing OBDII code P0703 in a Mercury can vary depending on the specific cause of the issue and the labor rates of the repair shop. It is advisable to get a diagnostic and repair estimate from a qualified mechanic.

8. Can I reset the OBDII code P0703 in my Mercury on my own?

- While you can reset the OBDII code P0703 using an OBDII scanner, it is important to first diagnose and fix the underlying issue causing the code to prevent it from reoccurring.

9. Will fixing OBDII code P0703 in my Mercury improve fuel efficiency or performance?

- Fixing OBDII code P0703 related to brake switch performance will not directly improve fuel efficiency or performance, but it will ensure the proper operation of critical safety systems in your vehicle.

10. How can I prevent OBDII code P0703 from occurring in my Mercury in the future?

- Regularly inspecting and maintaining the brake light switch, ensuring proper wiring connections, and addressing any brake light issues promptly can help prevent OBDII code P0703 from occurring in your Mercury.