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P0703 Mitsubishi Code - Stop Lamp Switch System Malfunction

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 Mitsubishi indicates Stop Lamp Switch System Malfunction.
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.
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Code Popularity 17,483
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Jul 13, 2020
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Code P0703 Mitsubishi Description

The Brake Pedal Position (BPP) switch is sometimes referred to as the stop lamp switch. The BPP switch provides a signal to the Engine Control Module (ECM) indicating the brakes are applied. The BPP switch is normally open and mounted on the brake pedal support. The Engine Control Module monitors the BPP switch. The Diagnostic Trouble Code (DTC) will set when the Engine Control Module did not receive a BPP switch input.
OBDII Code P0703 Mitsubishi - Stop Lamp Switch System Malfunction - AutoCodes.com
P0703 Mitsubishi Code - Stop Lamp Switch System Malfunction
What does this mean?

What are the Possible Causes of the DTC P0703 Mitsubishi?

  • 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 Engine Control Module (ECM)

How to Fix the DTC P0703 Mitsubishi?

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 Mitsubishi 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 Mitsubishi code?

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

Need Help with the 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 P0703 Mitsubishi Code

1. What does the OBDII code P0703 mean for a Mitsubishi?

P0703 indicates a malfunction in the Stop Lamp Switch System, which monitors the brake pedal's position and communicates it to the vehicle's control modules.

2. What are the symptoms of code P0703 in a Mitsubishi?

Common symptoms include brake lights not functioning properly, difficulty shifting gears, or the transmission staying in limp mode.

3. What causes the P0703 code on a Mitsubishi?

Potential causes include a faulty stop lamp switch, damaged wiring or connectors, or a blown fuse related to the brake light circuit.

4. Can a bad stop lamp switch affect the transmission on a Mitsubishi?

Yes, the stop lamp switch is linked to the transmission control system, so a malfunction can cause issues like the transmission staying in limp mode or gear shifting problems.

5. How do I diagnose code P0703 on a Mitsubishi?

Inspect the stop lamp switch, check the brake light functionality, examine wiring and connectors for damage, and test the circuit for continuity using a multimeter.

6. Can I drive my Mitsubishi with the P0703 code?

Driving with this code is not recommended as it may affect braking system signals and transmission operation, compromising safety and vehicle performance.

7. How can I fix the P0703 code on my Mitsubishi?

Replace the stop lamp switch if faulty, repair or replace damaged wiring or connectors, and ensure the brake light circuit fuse is functioning correctly.

8. How much does it cost to fix the P0703 code in a Mitsubishi?

Repair costs vary but typically range from $50 to $150 for parts and labor, depending on the extent of the issue and the model of the vehicle.

9. Can a blown brake light fuse trigger the P0703 code in a Mitsubishi?

Yes, a blown brake light fuse can interrupt the stop lamp switch signal and cause the P0703 code to appear.

10. How do I reset the P0703 code on a Mitsubishi after repairs?

Use an OBDII scanner to clear the code after addressing the issue, or disconnect the battery for a few minutes to reset the vehicle’s ECU.

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