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B1804 Chrysler Code - Driver Door Lock/Unlock Switch Circuit Stuck Unlock

Quick Answer

The B1804 Chrysler diagnostic trouble code (DTC) indicates that there is a problem with the driver door lock/unlock switch circuit being stuck in the unlock position. Common causes include Faulty driver door lock/unlock switch, Wiring issues or shorts in the circuit, Malfunctioning door lock actuator. 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
B1804 Chrysler indicates Driver Door Lock/Unlock Switch Circuit Stuck Unlock.
Common causes
Common causes include Faulty driver door lock/unlock switch, Wiring issues or shorts in the circuit, Malfunctioning door lock actuator.
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 07, 2024
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Code B1804 Chrysler Description

The B1804 Chrysler diagnostic trouble code (DTC) indicates that there is a problem with the driver door lock/unlock switch circuit being stuck in the unlock position. This means that the control module in the vehicle is detecting a fault in the circuitry related to the driver's door lock/unlock switch. The driver door lock/unlock switch is responsible for allowing the driver to lock or unlock the door electronically, rather than manually turning a key.

OBDII Code B1804 Chrysler - Driver Door Lock/Unlock Switch Circuit Stuck Unlock
B1804 Chrysler Code - Driver Door Lock/Unlock Switch Circuit Stuck Unlock

Common Causes of B1804 Chrysler

  1. Faulty driver door lock/unlock switch
  2. Wiring issues or shorts in the circuit
  3. Malfunctioning door lock actuator
  4. Defective control module
  5. Corrosion or moisture damage in the electrical connections

Symptoms of B1804 Chrysler

  1. Inability to lock or unlock the driver's door using the switch
  2. Door locks automatically unlocking while driving
  3. Warning light on the dashboard indicating a door lock/unlock system fault
  4. Audible clicking noise from the door lock actuator when attempting to lock the door

How to Fix B1804 Chrysler

  1. Start by diagnosing the specific cause of the issue using a diagnostic scanner to retrieve the DTC and pinpoint the fault.
  2. Inspect the driver door lock/unlock switch for any visible signs of damage or wear. Replace the switch if necessary.
  3. Check the wiring harness connected to the switch for any breaks, shorts, or corrosion. Repair or replace any damaged wiring.
  4. Test the door lock actuator to ensure it is functioning correctly. Replace the actuator if it is faulty.
  5. If all components check out, inspect the control module for any faults and replace if needed.

Cost to Fix B1804 Chrysler

The cost of repairing a B1804 Chrysler code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $100 to $300 for parts and labor. Keep in mind that diagnostic time and labor rates can fluctuate, so it's best to get a quote from a local auto repair shop for a more accurate estimate.

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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 B1804 Chrysler Code

1. What are the common symptoms of OBDII code B1804 in a Chrysler related to the driver door lock/unlock switch circuit?

The common symptoms include the driver door not locking or unlocking properly using the switch, issues with the central locking system, or the door lock appearing stuck in the unlock position.

2. What could cause the OBDII code B1804 in a Chrysler indicating an issue with the driver door lock/unlock switch circuit?

Possible causes of this code include a malfunctioning driver door lock/unlock switch, damaged wiring or connectors in the circuit, or a faulty door lock actuator.

3. How can I diagnose the OBDII code B1804 in a Chrysler related to the driver door lock/unlock switch circuit?

Diagnosing this code typically involves inspecting the driver door lock/unlock switch for proper functionality, checking the wiring and connectors for any damage or corrosion, and testing the door lock actuator's operation.

4. Are there any simple repairs I can try to fix the OBDII code B1804 in a Chrysler without professional help?

You can try cleaning the contacts of the driver door lock/unlock switch, ensuring all wiring connections are secure, and checking for any visible signs of damage to the wiring harness as simple repair steps.

5. Is it safe to continue driving my Chrysler with the OBDII code B1804 related to the driver door lock/unlock switch circuit issue?

While the vehicle may still be operable with this code, it's recommended to address the issue promptly to avoid potential safety concerns or further damage to the door locking system.

6. Can the OBDII code B1804 in a Chrysler be reset without fixing the underlying driver door lock/unlock switch circuit problem?

Resetting the code without addressing the root cause may temporarily clear the error code, but it's likely to reappear until the underlying issue with the driver door lock/unlock switch circuit is resolved.

7. How much does it typically cost to repair the OBDII code B1804 in a Chrysler related to the driver door lock/unlock switch circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor charges, and diagnostic fees from a qualified mechanic or dealership.

8. What should I do if I encounter the OBDII code B1804 in my Chrysler repeatedly despite attempting repairs?

If the code persists after repair attempts, it's advisable to seek professional assistance from a certified technician who can perform advanced diagnostics to pinpoint the exact source of the problem.

9. Can extreme weather conditions affect the occurrence of the OBDII code B1804 in a Chrysler related to the driver door lock/unlock switch circuit?

Extreme temperatures or moisture exposure can potentially exacerbate issues with the door lock/unlock switch circuit, leading to intermittent faults or malfunctions triggering the B1804 trouble code.

10. Is it possible to prevent the OBDII code B1804 related to the driver door lock/unlock switch circuit issue in a Chrysler?

Regular maintenance checks, prompt repairs of any door lock system malfunctions, and avoiding excessive force when operating the switch can help prevent the recurrence of the B1804 trouble code in your Chrysler.

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