Engine-Codes.com
Engine-Codes – RAM – B1803 RAM

B1803 RAM Code - Driver Door Lock/Unlock Switch Circuit Stuck Lock

Quick Answer

The B1803 RAM diagnostic trouble code (DTC) indicates that there is a problem with the driver door lock/unlock switch circuit being stuck in the lock position. Common causes include Faulty driver door lock/unlock switch, Wiring issues such as a short circuit or open circuit, Faulty body control module (BCM). 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
B1803 RAM indicates Driver Door Lock/Unlock Switch Circuit Stuck Lock.
Common causes
Common causes include Faulty driver door lock/unlock switch, Wiring issues such as a short circuit or open circuit, Faulty body control module (BCM).
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 17, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1803 RAM Description

The B1803 RAM diagnostic trouble code (DTC) indicates that there is a problem with the driver door lock/unlock switch circuit being stuck in the lock position. This issue can affect the vehicle's performance by preventing the driver from being able to unlock or lock the door using the switch. This can be a significant inconvenience and a safety concern, especially in emergency situations where quick access to the vehicle is necessary.

OBDII Code B1803 RAM - Driver Door Lock/Unlock Switch Circuit Stuck Lock
B1803 RAM Code - Driver Door Lock/Unlock Switch Circuit Stuck Lock

Common Causes of B1803 RAM

  1. Faulty driver door lock/unlock switch.
  2. Wiring issues such as a short circuit or open circuit.
  3. Faulty body control module (BCM).
  4. Corrosion or damage to electrical connectors.
  5. Water intrusion into the door lock/unlock switch or wiring.

Symptoms of B1803 RAM

  1. Inability to unlock the driver's door using the switch.
  2. Inability to lock the driver's door using the switch.
  3. Unusual clicking or buzzing sounds when attempting to use the door lock/unlock switch.
  4. Interior lights not turning on or off when the door is locked or unlocked.

How to Fix B1803 RAM

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific DTC and pinpoint the exact cause of the problem.
  2. Inspect the driver door lock/unlock switch for any visible damage or signs of wear. Replace the switch if necessary.
  3. Check the wiring harness for any damage, corrosion, or loose connections. Repair or replace any faulty wiring.
  4. Test the body control module (BCM) to ensure it is functioning correctly. Replace the BCM if it is found to be faulty.
  5. Clear the DTC from the vehicle's memory using the scan tool after completing the repairs and test the central locking system to verify that the issue has been resolved.

Cost to Fix B1803 RAM

The typical repair costs for addressing the B1803 RAM DTC can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 and $300 for parts and labor to repair this problem. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

Need more information about the B1803 RAM code?

Need more information on how to fix the B1803 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1803 RAM code diagnosed by a professional: Find a repair shop in your area

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 B1803 RAM Code

1. What does the OBDII code B1803 mean for a RAM vehicle?

Code B1803 indicates that the driver door lock/unlock switch circuit is stuck in the "lock" position, meaning the system is detecting an issue with the locking mechanism or its electrical circuit.

2. What are the common symptoms of the B1803 code?

Common symptoms include the driver door lock being unresponsive, the inability to lock or unlock the door using the switch, and possibly a "stuck lock" warning or related error message.

3. What causes the B1803 code to appear?

The code can be caused by a faulty driver door lock/unlock switch, damaged wiring or connectors in the circuit, a malfunctioning door lock actuator, or an issue with the vehicle's body control module (BCM).

4. How can I diagnose the B1803 code?

Start by inspecting the driver door lock/unlock switch, checking for physical damage or debris. Then, examine the wiring and connectors for corrosion or breaks. Use a multimeter to test the circuit for continuity and proper voltage.

5. Can a faulty door lock actuator trigger the B1803 code?

Yes, a malfunctioning door lock actuator can cause the circuit to become stuck in the lock position, triggering the code.

6. Is the B1803 code a serious issue?

While it may not affect the vehicle's drivability, it can compromise security and convenience. Prompt repair is recommended to restore proper door locking functionality.

7. How do I fix the B1803 code?

Repairs may include replacing the driver door lock/unlock switch, repairing or replacing damaged wiring or connectors, or replacing the door lock actuator. In some cases, the BCM may need reprogramming or replacement.

8. Can I clear the B1803 code without repairing the issue?

Clearing the code without addressing the underlying problem is not recommended, as the issue will likely recur. Proper diagnosis and repair are necessary to resolve the code.

9. How much does it cost to fix the B1803 code?

The repair cost can vary depending on the cause. Replacing a door lock/unlock switch or actuator typically costs between $100-$300, while wiring repairs or BCM replacement may be more expensive.

10. Can the B1803 code be prevented?

Regular maintenance, such as keeping electrical connections clean and free of corrosion, and addressing door lock issues promptly, can help prevent the code from appearing.

Discuss the causes and fixes for B1803 RAM OBDII Code

Submit a New Comment

Code B1803 RAM comments

No comments found for this page.