AutoCodes – Nissan – P1805 2009 Nissan Sentra

P1805 2009 Nissan Sentra Code - Stop Lamp Switch

Quick Answer

The brake switch signal is applied to the Engine Control Module (ECM) through the stop lamp switch when the brake pedal is depressed. Common causes include Faulty Stop Lamp Switch, Stop Lamp Switch harness is open or shorted, Stop Lamp Switch circuit poor electrical connection. 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 2009 Nissan Sentra indicates Stop Lamp Switch.
Common causes: Common causes include Faulty Stop Lamp Switch, Stop Lamp Switch harness is open or shorted, Stop Lamp Switch circuit poor electrical connection.
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 2,987

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 Nov 05, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1805 2009 Nissan Sentra Description

The brake switch signal is applied to the Engine Control Module (ECM) through the stop lamp switch when the brake pedal is depressed. This signal is used mainly to decrease the engine speed when the vehicle is driving. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a faulty Stop Lamp Switch.

OBDII Code P1805 2009 Nissan Sentra - Stop Lamp Switch - AutoCodes.com — P1805 2009 Nissan Sentra Code - Stop Lamp Switch

What does this mean?

What are the Possible Causes of the DTC P1805 2009 Nissan Sentra?

Faulty Stop Lamp Switch
Stop Lamp Switch harness is open or shorted
Stop Lamp Switch circuit poor electrical connection

How to Fix the DTC P1805 2009 Nissan Sentra?

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 to see all the brake lights are working, if they are not check the stop lamp switch. (see picture)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1805 2009 Nissan Sentra 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 P1805 2009 Nissan Sentra code?

Need more information on how to fix the P1805 2009 Nissan Sentra code? Get Access to Factory Service Manuals

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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 P1805 2009 Nissan Sentra Code

What does the OBDII code P1805 mean for a 2009 Nissan Sentra?

P1805 indicates a malfunction with the stop lamp switch, which is responsible for controlling the brake lights and can affect other systems like the cruise control.

What are common symptoms of the P1805 code?

Common symptoms include malfunctioning brake lights, inability to engage cruise control, and a warning light on the dashboard.

What can cause the P1805 code to trigger?

Causes may include a faulty stop lamp switch, wiring issues, or poor connections in the brake light circuit.

How can I diagnose a P1805 code?

To diagnose P1805, inspect the stop lamp switch and its wiring for damage, test the switch for proper operation, and check the brake light functionality.

Is it safe to drive a 2009 Nissan Sentra with a P1805 code?

While it may be safe to drive, you should address the issue promptly to ensure proper brake light function and avoid potential safety hazards.

What repairs are typically needed for a P1805 code?

Repairs may involve replacing the stop lamp switch, repairing wiring issues, or cleaning corroded connectors.

How do I reset the P1805 code after repairs?

You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes, but ensure the issue is resolved before doing so.

Can a faulty stop lamp switch affect the cruise control?

Yes, a faulty stop lamp switch can prevent the cruise control from engaging or functioning properly, as it relies on signals from the brake light system.

What should I check if the brake lights are working but the P1805 code is still present?

If the brake lights are working, check the wiring and connectors for any corrosion or damage, and ensure that the stop lamp switch is correctly aligned and functioning.

Is the stop lamp switch an expensive part to replace?

The stop lamp switch itself is generally inexpensive, but labor costs may vary depending on the vehicle's service requirements and the mechanic's rates.