AutoCodes – RAM – B1803 RAM

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

Quick Answer

The Instrument Cluster monitors Driver Door Lock/Unlock Switch. Common causes include Faulty Driver Door Lock/Unlock Switch, Driver Door Lock/Unlock Switch harness is open or shorted, Driver Door Lock/Unlock 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: B1803 RAM indicates Driver Door Lock/Unlock Switch Circuit Stuck Lock.
Common causes: Common causes include Faulty Driver Door Lock/Unlock Switch, Driver Door Lock/Unlock Switch harness is open or shorted, Driver Door Lock/Unlock 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 684

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1803 RAM Description

The Instrument Cluster monitors Driver Door Lock/Unlock Switch. When the Instrument Cluster senses voltage to the driver door lock switch between 2.0 and 2.9 volts for over 10 seconds, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B1803 RAM - Driver Door Lock/Unlock Switch Circuit Stuck Lock - AutoCodes.com — B1803 RAM Code - Driver Door Lock/Unlock Switch Circuit Stuck Lock

What does this mean?

What are the Possible Causes of the DTC B1803 RAM?

Faulty Driver Door Lock/Unlock Switch
Driver Door Lock/Unlock Switch harness is open or shorted
Driver Door Lock/Unlock Switch circuit poor electrical connection
Faulty Instrument Cluster

How to Fix the DTC B1803 RAM?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1803 RAM 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.

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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 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.