AutoCodes – Generic – B2047

B2047 Code - Right Rear Stop Lamp Circuit Open

Quick Answer

When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB) and the high mounted stoplamp. Common causes include Faulty High Mounted Stoplamp, High Mounted Stoplamp harness is open or shorted, High Mounted Stoplamp 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: B2047 indicates Right Rear Stop Lamp Circuit Open.
Common causes: Common causes include Faulty High Mounted Stoplamp, High Mounted Stoplamp harness is open or shorted, High Mounted Stoplamp 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 1,494

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 Feb 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2047 Description

When the brake pedal is applied, the stoplamp switch routes voltage to the Smart Junction Box (SJB) and the high mounted stoplamp. When the SJB detects the brake pedal is applied, the SJB provides voltage to the Left (LH) and Right (RH) rear stoplamps. The Diagnostic Trouble Code (DTC) sets when the SJB detects an open from the RH rear stop/turn lamp voltage supply circuit.

OBDII Code B2047 - Right Rear Stop Lamp Circuit Open - AutoCodes.com — B2047 Code - Right Rear Stop Lamp Circuit Open

What does this mean?

What are the Possible Causes of the DTC B2047?

Faulty High Mounted Stoplamp
High Mounted Stoplamp harness is open or shorted
High Mounted Stoplamp circuit poor electrical connection
Faulty Bulb Holder
Faulty Smart Junction Box (SJB)

How to Fix the DTC B2047?

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 B2047 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 B2047 code?

Need more information on how to fix the B2047 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2047 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2047 Ford — Right Rear Stop Lamp Circuit Open
B2047 Lexus — Seat Belt Control ECU Inner Circuit Malfunction
B2047 Lincoln — Right Rear Stop Lamp Circuit Open
B2047 Mercury — Right Rear Stop Lamp Circuit Open
B2047 Scion — Seat Belt Control ECU Inner Circuit Malfunction
B2047 Toyota — Seat Belt Control ECU Inner Circuit Malfunction

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 B2047 Code

1. What does the OBDII code B2047 mean?

Code B2047 indicates that there is an open circuit in the right rear stop lamp circuit, meaning the electrical connection to the right rear brake light is interrupted.

2. What are the common symptoms of code B2047?

Symptoms include the right rear brake light not working, a warning light on the dashboard, or a possible "Check Lamp" message in some vehicles.

3. What causes the B2047 code to appear?

Common causes include a blown bulb, damaged wiring, corroded connectors, or a faulty brake light socket.

4. Can I still drive my car with the B2047 code?

While the vehicle may still be drivable, it is unsafe due to the non-functioning right rear brake light, which could increase the risk of accidents.

5. How do I diagnose the B2047 code?

Start by checking the right rear brake light bulb, inspect the wiring and connectors for damage or corrosion, and test the brake light socket for proper voltage.

6. How do I fix the B2047 code?

Repairs may involve replacing the brake light bulb, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing a faulty brake light socket.

7. Can a blown fuse cause the B2047 code?

Yes, a blown fuse in the brake light circuit can interrupt power to the right rear brake light, triggering the code.

8. How much does it cost to repair a B2047 code?

The cost depends on the issue. Replacing a bulb may cost $10-$20, while fixing damaged wiring or a socket could range from $50 to $200.

9. Can moisture in the tail light assembly cause the B2047 code?

Yes, moisture can lead to corrosion in the connectors or short circuits, which may trigger this code.

10. Will clearing the code with a scan tool fix the issue?

Clearing the code may temporarily reset the warning, but the underlying issue in the right rear stop lamp circuit must be repaired to prevent the code from returning.