AutoCodesLincoln – B2045 Lincoln

B2045 Lincoln Code - Left 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
B2045 Lincoln indicates Left 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 454
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Feb 26, 2020
💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2045 Lincoln 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 LH rear stop/turn lamp voltage supply circuit.
OBDII Code B2045 Lincoln - Left Rear Stop Lamp Circuit Open - AutoCodes.com
B2045 Lincoln Code - Left Rear Stop Lamp Circuit Open

What are the Possible Causes of the DTC B2045 Lincoln?

  • 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 B2045 Lincoln?

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 B2045 Lincoln 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 B2045 Lincoln code?

Need more information on how to fix the B2045 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2045 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 B2045 Lincoln Code

1. What does the OBDII code B2045 mean for a Lincoln vehicle?

The code B2045 indicates an open circuit in the left rear stop lamp, meaning the electrical connection is disrupted.

2. What are the common symptoms of B2045 in a Lincoln?

Symptoms include the left rear stop lamp not functioning, potential warning lights on the dashboard, and reduced visibility for other drivers.

3. What causes the B2045 code to appear in a Lincoln?

Causes may include a damaged or broken wire, a faulty bulb, a corroded connector, or a malfunctioning lamp assembly.

4. Can I still drive my Lincoln with the B2045 code?

Yes, but it’s not recommended as the left rear stop lamp is critical for safety and can increase the risk of accidents.

5. How can I diagnose the B2045 code in a Lincoln?

Inspect the bulb, wiring, and connectors for damage or corrosion, and use a multimeter to check continuity in the circuit.

6. What tools are needed to fix the B2045 code?

Tools may include a multimeter, replacement bulbs, wiring repair tools, and possibly a new lamp assembly.

7. How much does it cost to repair the B2045 code on a Lincoln?

Repair costs depend on the issue but might range from $20 for a bulb replacement to $150 or more if wiring or the lamp assembly needs repair.

8. Can a faulty bulb trigger the B2045 code?

Yes, a burnt-out or improperly seated bulb can cause the circuit to open and trigger the code.

9. Will clearing the B2045 code fix the problem?

No, clearing the code will not fix the underlying issue; repairs must be made to resolve the circuit fault.

10. How can I prevent the B2045 code from recurring?

Regularly inspect the stop lamp, wiring, and connectors for wear or corrosion, and replace components as needed.

Discuss the causes and fixes for B2045 Lincoln OBDII Code

Code B2045 Lincoln comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play