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Engine-Codes – Generic – B2046

B2046 Code - Right Rear Stop Lamp Circuit Short To Ground

Quick Answer

The B2046 diagnostic trouble code indicates a problem with the right rear stop lamp circuit short to ground in the vehicle. Common causes include Damaged wiring harness, Faulty stop lamp switch, Short circuit in the wiring. 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
B2046 indicates Right Rear Stop Lamp Circuit Short To Ground.
Common causes
Common causes include Damaged wiring harness, Faulty stop lamp switch, Short circuit in the wiring.
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 13, 2024
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Code B2046 Description

The B2046 diagnostic trouble code indicates a problem with the right rear stop lamp circuit short to ground in the vehicle. This means that there is an electrical issue in the circuit that controls the right rear stop lamp, causing it to short to the vehicle's ground. The stop lamp is an essential safety feature that alerts other drivers when you are braking, so it is crucial to address this issue promptly.

OBDII Code B2046 - Right Rear Stop Lamp Circuit Short To Ground
B2046 Code - Right Rear Stop Lamp Circuit Short To Ground

Common Causes of B2046

  1. Damaged wiring harness
  2. Faulty stop lamp switch
  3. Short circuit in the wiring
  4. Problem with the body control module
  5. Corrosion in the electrical connections

Symptoms of B2046

  1. Right rear stop lamp not working
  2. Brake lights staying on constantly
  3. Dashboard warning light indicating a brake system issue
  4. Fuse for the right rear stop lamp blowing repeatedly

How to Fix B2046

  1. Begin by visually inspecting the wiring harness and connections for any visible damage or corrosion.
  2. Test the stop lamp switch to determine if it is functioning correctly.
  3. Use a multimeter to check for a short circuit in the wiring leading to the right rear stop lamp.
  4. If necessary, replace any damaged wiring or components in the circuit.
  5. Clear the diagnostic trouble code from the vehicle's system and test the right rear stop lamp to ensure it is functioning properly.

Cost to Fix B2046

The typical repair costs for addressing a right rear stop lamp circuit short to ground can vary depending on the specific cause of the issue and the extent of the damage. In general, the cost of parts for this repair could range from $50 to $200, while labor costs could range from $100 to $300. Keep in mind that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It is recommended to consult with a professional mechanic to get a more accurate cost estimate for this repair.

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Code B2046 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.

Frequently Asked Questions about B2046 Code

1. What does OBDII code B2046 mean?

B2046 indicates a short to ground in the right rear stop lamp circuit, meaning there’s likely an electrical fault preventing the stop lamp from functioning properly.

2. What are the symptoms of code B2046?

The main symptom is that the right rear stop lamp does not illuminate when the brake pedal is pressed. You might also notice a warning light on the dashboard.

3. What causes code B2046?

Common causes include damaged wiring, corroded connectors, a faulty bulb, or a malfunctioning stop lamp assembly.

4. Can a blown fuse cause code B2046?

Yes, a blown fuse in the stop lamp circuit can trigger this code if it’s related to a short to ground.

5. How do I diagnose code B2046?

Start by visually inspecting the right rear stop lamp wiring, connectors, and bulb. Use a multimeter to test for continuity or shorts in the circuit.

6. Can I still drive with code B2046?

While the vehicle is drivable, it’s unsafe to drive without a functioning stop lamp, as it increases the risk of rear-end collisions.

7. How do I fix code B2046?

Repairs may involve replacing a damaged bulb, repairing or replacing shorted wiring, cleaning corroded connectors, or replacing the stop lamp assembly.

8. How much does it cost to fix code B2046?

Costs vary depending on the issue. Replacing a bulb is inexpensive, but repairing wiring or replacing the stop lamp assembly can cost $50 to $200 or more.

9. Can corrosion cause code B2046?

Yes, corrosion in the wiring or connectors of the stop lamp circuit can create a short to ground, triggering this code.

10. Will clearing the code fix the issue?

Clearing the code will remove it temporarily, but the underlying problem in the circuit must be repaired to prevent it from returning.

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