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Engine-Codes – Generic – B16C3

B16C3 Code - Front Right Sidemarker Lamp Control Circuit

Quick Answer

The B16C3 diagnostic trouble code (DTC) refers to a fault in the Front Right Sidemarker Lamp Control Circuit. Common causes include Faulty front right sidemarker lamp, Damaged wiring or connectors in the control circuit, Defective body control module (BCM) or lighting control module. 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
B16C3 indicates Front Right Sidemarker Lamp Control Circuit.
Common causes
Common causes include Faulty front right sidemarker lamp, Damaged wiring or connectors in the control circuit, Defective body control module (BCM) or lighting control module.
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 30, 2024
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Code B16C3 Description

The B16C3 diagnostic trouble code (DTC) refers to a fault in the Front Right Sidemarker Lamp Control Circuit. This code indicates that there is a malfunction in the circuit responsible for controlling the front right sidemarker lamp on the vehicle. The sidemarker lamp is a safety feature that enhances the visibility of the vehicle to other drivers, especially in low light conditions or during inclement weather.

OBDII Code B16C3 - Front Right Sidemarker Lamp Control Circuit
B16C3 Code - Front Right Sidemarker Lamp Control Circuit

Common Causes of B16C3

  1. Faulty front right sidemarker lamp
  2. Damaged wiring or connectors in the control circuit
  3. Defective body control module (BCM) or lighting control module
  4. Corrosion or poor connections in the circuit
  5. Electrical issues such as a blown fuse or relay related to the sidemarker lamp

Symptoms of B16C3

  1. Front right sidemarker lamp not illuminating
  2. Dashboard warning light indicating a fault in the lighting system
  3. Flickering or intermittent operation of the front right sidemarker lamp
  4. Vehicle failing state inspections due to non-functional sidemarker lamp

How to Fix B16C3

  1. Begin by visually inspecting the front right sidemarker lamp, wiring, and connectors for any visible damage or corrosion.
  2. Test the sidemarker lamp using a multimeter to check for continuity and proper operation.
  3. Check the fuse and relay associated with the sidemarker lamp to ensure they are functioning correctly.
  4. If the lamp, wiring, and connectors are in good condition, the issue may lie with the body control module (BCM) or lighting control module, which may require reprogramming or replacement.
  5. Clear the DTC using a diagnostic scan tool after completing the repair to reset the system and ensure the code does not reappear.

Cost to Fix B16C3

The cost of repairing the Front Right Sidemarker Lamp Control Circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of issue can range from $100 to $300, including parts and labor. However, prices may be higher if the body control module or lighting control module needs to be replaced. It's recommended to consult with a professional mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model. Keep in mind that diagnostic time and labor rates can vary, so it's advisable to inquire about these factors when seeking repairs.

What does this mean?

Tech Notes for B16C3

B16C3-11 FRONT RIGHT SIDEMARKER LAMP CONTROL CIRCUIT SHORT TO GROUND

B16C3-15 FRONT RIGHT SIDEMARKER LAMP CONTROL CIRCUIT SHORT TO BATTERY OR OPEN

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Code B16C3 Information for Specific Makes

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.

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