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P1805 Nissan Code - Stop Lamp Switch

Quick Answer

The P1805 code for Nissan vehicles indicates a problem with the stop lamp switch. Common causes include Faulty stop lamp switch: The most common cause of the P1805 code is a defective stop lamp switch that needs to be replaced, Wiring issues: Damage or corrosion to the wiring connected to the stop lamp switch can also trigger this code, Blown fuse: A blown fuse in the brake light circuit can prevent the stop lamp switch from functioning properly. 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
P1805 Nissan indicates Stop Lamp Switch.
Common causes
Common causes include Faulty stop lamp switch: The most common cause of the P1805 code is a defective stop lamp switch that needs to be replaced, Wiring issues: Damage or corrosion to the wiring connected to the stop lamp switch can also trigger this code, Blown fuse: A blown fuse in the brake light circuit can prevent the stop lamp switch from functioning properly.
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 Aug 25, 2024
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Code P1805 Nissan Description

The P1805 code for Nissan vehicles indicates a problem with the stop lamp switch. This switch is responsible for activating the brake lights when the brake pedal is pressed, signaling to other drivers that the vehicle is slowing down or coming to a stop. When this switch malfunctions, it can lead to a variety of issues, including safety concerns and potential legal consequences if the brake lights are not functioning properly.

OBDII Code P1805 Nissan - Stop Lamp Switch
P1805 Nissan Code - Stop Lamp Switch

Common Causes of P1805 Nissan

  1. Faulty stop lamp switch: The most common cause of the P1805 code is a defective stop lamp switch that needs to be replaced.
  2. Wiring issues: Damage or corrosion to the wiring connected to the stop lamp switch can also trigger this code.
  3. Blown fuse: A blown fuse in the brake light circuit can prevent the stop lamp switch from functioning properly.
  4. Brake pedal position sensor malfunction: If the sensor that detects the position of the brake pedal is not working correctly, it can affect the operation of the stop lamp switch.

Symptoms of P1805 Nissan

  1. Brake lights not working: One of the most common symptoms of a faulty stop lamp switch is the brake lights not illuminating when the brake pedal is pressed.
  2. Inability to shift out of park: Some vehicles may have a safety feature that prevents the shifter from being moved out of park if the brake pedal is not pressed, which can be affected by a malfunctioning stop lamp switch.
  3. Cruise control not working: The stop lamp switch is also used to deactivate the cruise control system when the brake pedal is pressed, so a faulty switch can cause issues with the cruise control function.
  4. Check engine light: The P1805 code itself may trigger the check engine light to illuminate on the dashboard, signaling that there is a problem with the stop lamp switch.

How to Fix P1805 Nissan

  1. Diagnose the issue: Use a scan tool to read the trouble code and inspect the stop lamp switch, wiring, and related components for any visible damage.
  2. Replace the stop lamp switch: If the switch is found to be faulty, disconnect the wiring harness, remove the old switch, and install a new one in its place.
  3. Check and repair wiring: Inspect the wiring connected to the stop lamp switch for any damage or corrosion, and repair or replace as needed.
  4. Test the brake lights: After replacing the switch and checking the wiring, test the brake lights to ensure they are functioning properly.
  5. Clear the trouble code: Use a scan tool to clear the P1805 code from the vehicle's computer system, and verify that the check engine light is no longer illuminated.

Cost to Fix P1805 Nissan

The cost of repairing a P1805 code related to the stop lamp switch can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the parts for a stop lamp switch replacement can range from $20 to $50, while the labor cost can be between $50 and $100. In total, you can expect to pay anywhere from $70 to $150 for this repair. It's recommended to contact local auto repair shops for more accurate pricing based on your specific vehicle and location.

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Information for Specific Nissan Models

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 P1805 Nissan Code

1. What are the common symptoms of OBDII code P1805 Nissan (Stop Lamp Switch)?

One common symptom is the inability to shift out of park, as the code relates to issues with the stop lamp switch.

2. What are the possible causes of the P1805 Nissan code?

The P1805 code is typically triggered by a malfunction in the stop lamp switch, often caused by a faulty switch or wiring issues.

3. How can I diagnose the issue related to the P1805 code?

To diagnose the issue, check the stop lamp switch for proper operation, inspect the wiring for any damage, and ensure the switch is properly adjusted.

4. Can a faulty stop lamp switch affect the vehicle's brake lights?

Yes, a faulty stop lamp switch can lead to issues with the brake lights, including them not illuminating when the brake pedal is pressed.

5. How can I repair the P1805 Nissan code related to the stop lamp switch?

Repair options include replacing the faulty stop lamp switch, repairing any damaged wiring, and adjusting the switch to ensure proper operation.

6. Are there any safety concerns associated with the P1805 code?

Yes, addressing the P1805 code promptly is important as it can affect the proper operation of the vehicle's brake lights, potentially compromising safety.

7. Can the P1805 code be triggered by other issues besides the stop lamp switch?

While rare, the P1805 code can sometimes be triggered by issues with the brake light circuit or related components.

8. Is it safe to continue driving with the P1805 code present?

It is not recommended to continue driving with the P1805 code active, as it can impact the proper functioning of the brake lights and potentially pose a safety risk.

9. Can resetting the OBDII system clear the P1805 code temporarily?

Resetting the OBDII system may temporarily clear the P1805 code, but if the underlying issue with the stop lamp switch is not addressed, the code is likely to reappear.

10. Will the P1805 code cause the vehicle to fail an emissions test?

The P1805 code itself is not directly related to emissions, but it should still be addressed promptly to ensure the vehicle's overall safety and functionality.

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