AutoCodes – Generic – B16D1

B16D1 Code - Left DRL Lamp Control Circuit High

Quick Answer

The Body Control Module (BCM) monitors the Left Daytime Running Lights (DRL) Lamp. Common causes include Faulty Left Front Headlamp Assembly, Left Front Headlamp Assembly harness is open or shorted, Left 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: B16D1 indicates Left DRL Lamp Control Circuit High.
Common causes: Common causes include Faulty Left Front Headlamp Assembly, Left Front Headlamp Assembly harness is open or shorted, Left 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 962

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 B16D1 Description

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

OBDII Code B16D1 - Left DRL Lamp Control Circuit High - AutoCodes.com — B16D1 Code - Left DRL Lamp Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B16D1?

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

How to Fix the DTC B16D1?

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 B16D1 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 B16D1 code?

Need more information on how to fix the B16D1 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B16D1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B16D1 Chrysler — Left DRL Lamp Control Circuit High
B16D1 Dodge — Left DRL Lamp Control Circuit High
B16D1 Jeep — Left DRL Lamp Control Circuit High
B16D1 RAM — Left DRL Lamp Control Circuit High

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 B16D1 Code

1. What does OBDII code B16D1 mean?

Code B16D1 indicates a problem with the Left Daytime Running Light (DRL) control circuit, specifically that the circuit's voltage is higher than expected.

2. What are the common symptoms of the B16D1 code?

Typical symptoms include the left daytime running light not working, flickering, or staying on even when it should be off. A warning light may also appear on the dashboard.

3. What causes the B16D1 code to appear?

Common causes include a faulty DRL bulb, damaged or corroded wiring, a defective control module, or a poor ground connection in the DRL circuit.

4. Can a bad DRL bulb trigger the B16D1 code?

Yes, a failing or incorrect DRL bulb can cause the circuit voltage to go out of range, triggering the B16D1 code.

5. How do you diagnose the B16D1 code?

Diagnosis involves visually inspecting the DRL bulb, wiring, and connectors for damage or corrosion, testing the circuit voltage with a multimeter, and checking for proper grounding.

6. Is it safe to drive with the B16D1 code?

While the code itself doesnâ€™t typically affect drivability, a malfunctioning DRL can reduce visibility to other drivers, especially during daytime conditions.

7. How do you fix the B16D1 code?

Repairs may include replacing the DRL bulb, repairing damaged wiring, cleaning corroded connections, or replacing a faulty DRL control module.

8. Can clearing the B16D1 code fix the issue?

Clearing the code may temporarily turn off the warning light, but the underlying issue must be addressed to prevent the code from returning.

9. What tools are needed to fix the B16D1 code?

Common tools include a multimeter for testing voltage, basic hand tools for bulb replacement, and an OBDII scanner to read and clear codes.

10. Can a DIYer repair the B16D1 code issue?

Yes, a DIYer with basic automotive knowledge can often resolve this issue by replacing the bulb or repairing simple wiring problems. However, more complex issues may require professional assistance.