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Engine-Codes – Generic – P1703

P1703 Code - Brake Switch Out Of Self Test Range

Quick Answer

The P1703 diagnostic trouble code indicates that the brake switch is out of the self-test range. Common causes include Faulty brake switch, Wiring issues, Malfunctioning ECM. 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
P1703 indicates Brake Switch Out Of Self Test Range.
Common causes
Common causes include Faulty brake switch, Wiring issues, Malfunctioning ECM.
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 10, 2024
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Code P1703 Description

The P1703 diagnostic trouble code indicates that the brake switch is out of the self-test range. The brake switch is a critical component in the vehicle's braking system, as it sends a signal to the engine control module (ECM) when the brake pedal is pressed. This signal is used by the ECM to adjust various systems in the vehicle, such as controlling engine speed, transmission shifting, and disabling cruise control. When the brake switch is out of the self-test range, it means that the ECM is not receiving the expected signal from the brake switch, which can lead to various performance issues.

OBDII Code P1703 - Brake Switch Out Of Self Test Range
P1703 Code - Brake Switch Out Of Self Test Range

Common Causes of P1703

  1. Faulty brake switch.
  2. Wiring issues.
  3. Malfunctioning ECM.
  4. Problem with the brake pedal position sensor.
  5. Corrosion or damage to electrical connections.

Symptoms of P1703

  1. Vehicle may not start or have difficulty starting.
  2. Issues with shifting gears.
  3. Cruise control may not function properly.
  4. Brake lights may not work correctly.
  5. Erratic behavior in vehicle systems.

How to Fix P1703

  1. Perform a diagnostic scan to retrieve the specific trouble code and identify the underlying cause.
  2. Inspect the brake switch, wiring, and connections for any damage or corrosion.
  3. Test the brake switch and brake pedal position sensor for proper functionality.
  4. Replace the faulty components, such as the brake switch or wiring harness, if necessary.
  5. Clear the trouble code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1703

The cost of repairing a P1703 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a faulty brake switch or repairing wiring issues can range from $100 to $300. Additional costs may be incurred if other components need to be replaced or if extensive diagnostics are required. It's recommended to consult with a professional mechanic to get an accurate cost estimate for your specific vehicle make and model. Labor rates at auto repair shops typically range from $80 to $150 per hour, but rates can vary based on location and the shop's policies.

What does this mean?

Tech Notes for P1703

Check for correct function of the stop lamps, if the stop lamps are not working change the brake switch.

Need more information about the P1703 code?

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Need Help with the Code?

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Code P1703 Information for Specific Makes

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 P1703 Code

1. What does the OBDII code P1703 mean?

P1703 indicates that the brake switch signal is out of the expected range during the self-test performed by the vehicle's powertrain control module (PCM).

2. What are the common symptoms of code P1703?

Symptoms may include the brake lights not functioning properly, ABS or traction control warning lights, cruise control not working, or no noticeable drivability issues in some cases.

3. What causes the P1703 code to appear?

Common causes include a faulty brake switch, misadjusted brake switch, damaged wiring or connectors, or issues with the PCM.

4. Can I drive with a P1703 code?

While the vehicle might still be drivable, safety systems like brake lights or cruise control could be affected, so it’s best to address the issue promptly.

5. How do I diagnose a P1703 code?

Start by inspecting the brake switch and its wiring for damage or loose connections. Use a multimeter to check if the switch is functioning correctly and verify the output voltage to the PCM.

6. How is the P1703 code fixed?

Repairs may involve replacing or adjusting the brake switch, repairing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the PCM.

7. Can a P1703 code cause the cruise control to stop working?

Yes, a malfunctioning brake switch can prevent the cruise control system from operating because the PCM cannot detect proper brake pedal input.

8. What tools are needed to troubleshoot a P1703 code?

Basic tools like a multimeter, OBDII scanner, and possibly a repair manual for your specific vehicle are necessary for accurate diagnosis.

9. How much does it cost to fix a P1703 code?

The cost depends on the cause. Replacing a brake switch typically ranges from $50 to $150, including labor, while wiring repairs or PCM replacement could be more expensive.

10. What happens if I ignore the P1703 code?

Ignoring the code could lead to safety issues, such as non-functional brake lights or cruise control problems, which increase the risk of accidents. It should be addressed promptly.

Discuss the causes and fixes for P1703 OBDII Code

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  • Over drive OD started to blink and gear box starts fail to change gears

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  • Let me check for more information. What model and year is your vehicle? do you have any other codes besides the P1703 code?

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  • i change the master cylinder the two rear calipers right and left i a lot of times every one said it has air in the lines but it shoots the break fuled out about 3 feet from the calaper bleed the breaks and i still have no brake paddle it goes all the way to the floor with no hard paddle easy all the way down to the floor

    Reply to Comment

  • Try bleeding all the calipers following the brake bleeding sequence. Start with the corner farthest from the driver and then proceed in order toward the driver (Right rear, left rear, right front, left front). Based on my experience, if the pedal goes all the way to the floor after replacing the brake master cylinder, the issue could be due to a faulty master cylinder or air still trapped in the system. If the problem persists, you might need to use a vacuum pump to properly bleed the brakes.

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