AutoCodes – Generic – B16D4

B16D4 Code - Right DRL Lamp Control Circuit Low

Quick Answer

The Body Control Module (BCM) monitors the Right Daytime Running Lights (DRL) Lamp. Common causes include Faulty Right Front Headlamp Assembly, Right Front Headlamp Assembly harness is open or shorted, Right Front Headlamp Assembly 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: B16D4 indicates Right DRL Lamp Control Circuit Low.
Common causes: Common causes include Faulty Right Front Headlamp Assembly, Right Front Headlamp Assembly harness is open or shorted, Right Front Headlamp Assembly 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 2,313

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 Jun 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B16D4 Description

The Body Control Module (BCM) monitors the Right Daytime Running Lights (DRL) Lamp. The BCM sets the OBDII code when the Right DRL Lamp is not to factory specifications.

OBDII Code B16D4 - Right DRL Lamp Control Circuit Low - AutoCodes.com — B16D4 Code - Right DRL Lamp Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B16D4?

Faulty Right Front Headlamp Assembly
Right Front Headlamp Assembly harness is open or shorted
Right Front Headlamp Assembly circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B16D4?

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 B16D4 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 B16D4 code?

Need more information on how to fix the B16D4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B16D4 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B16D4 Chrysler — Right DRL Lamp Control Circuit Low
B16D4 Dodge — Right DRL Lamp Control Circuit Low
B16D4 Jeep — Right DRL Lamp Control Circuit Low
B16D4 RAM — Right DRL Lamp Control Circuit Low

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 B16D4 Code

1. What are common symptoms of OBDII code B16D4 (Right DRL Lamp Control Circuit Low)?

- Dim or non-functional right daytime running light (DRL) lamp, dashboard warning light related to DRL system.

2. What are possible causes of OBDII code B16D4?

- Faulty wiring or connections, damaged DRL lamp, malfunctioning DRL control module, blown fuse related to the right DRL lamp circuit.

3. How can I diagnose the cause of OBDII code B16D4?

- Use a multimeter to test the continuity of wiring, inspect the condition of the DRL lamp, check the DRL control module for any visible damage.

4. Can I drive my vehicle with OBDII code B16D4?

- While it may be safe to drive with this code, it is recommended to address the issue promptly to ensure proper visibility and avoid potential electrical problems.

5. How do I repair OBDII code B16D4?

- Replace a faulty DRL lamp, repair or replace damaged wiring, replace the DRL control module if necessary, and reset the fault code with an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code B16D4?

- Check and clean the connections of the right DRL lamp, inspect the fuse related to the circuit, and consult the vehicle's service manual for specific troubleshooting steps.

7. Can weather conditions affect OBDII code B16D4?

- Extreme weather conditions, especially moisture or water exposure, can contribute to the malfunction of the right DRL lamp circuit and trigger this fault code.

8. How common is OBDII code B16D4 in vehicles?

- This code can occur in vehicles equipped with DRL systems, especially if there are issues with the right DRL lamp circuit components.

9. What is the typical cost to repair OBDII code B16D4 at a mechanic?

- The cost can vary depending on the exact cause of the issue, but expect to pay for parts and labor, which may range from $50 to $200 or more.

10. Can OBDII code B16D4 affect other vehicle systems?

- While this code specifically relates to the right DRL lamp control circuit, unresolved electrical issues can potentially impact other systems, so it's important to address it promptly.