B2046 Code - Right Rear Stop Lamp Circuit Short To Ground
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
- B2046 indicates Right Rear Stop Lamp Circuit Short To Ground.
- 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.
Code B2046 Description
What are the Possible Causes of the DTC B2046?
- 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 B2046?
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 B2046 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 B2046 code?
Need more information on how to fix the B2046 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2046 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- B2046 Ford — Right Rear Stop Lamp Circuit Short To Ground
- B2046 Lincoln — Right Rear Stop Lamp Circuit Short To Ground
- B2046 Mercury — Right Rear Stop Lamp Circuit Short To Ground
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.
Discuss the causes and fixes for B2046 OBDII Code
Code B2046 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
