AutoCodes – Lincoln – B2071 Lincoln

B2071 Lincoln Code - Hazard Switch Signal Short To Ground

Quick Answer

The Smart Junction Box (SJB) sends a voltage signal to the multifunction switch. Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch 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: B2071 Lincoln indicates Hazard Switch Signal Short To Ground.
Common causes: Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch 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 526

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 B2071 Lincoln Description

The Smart Junction Box (SJB) sends a voltage signal to the multifunction switch. When the hazard flasher lamp switch is engaged, the voltage signal is routed to ground. When the SJB detects a request for the hazard lamps, the SJB sends voltage to the all turn lamps. The hazard flasher lamp switch is a momentary contact switch. The Diagnostic Trouble Code (DTC) sets when the SJB detects a short to ground from the hazard flasher lamp switch input circuit.

OBDII Code B2071 Lincoln - Hazard Switch Signal Short To Ground - AutoCodes.com — B2071 Lincoln Code - Hazard Switch Signal Short To Ground

What does this mean?

What are the Possible Causes of the DTC B2071 Lincoln?

Faulty Multifunction Switch
Multifunction Switch harness is open or shorted
Multifunction Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B2071 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 B2071 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 B2071 Lincoln code?

Need more information on how to fix the B2071 Lincoln code? Get Access to Factory Service Manuals

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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 B2071 Lincoln Code

1. What are the common symptoms of OBDII code B2071 Lincoln Hazard Switch Signal Short To Ground?

- Common symptoms include non-functioning hazard lights, illuminated warning lights on the dashboard, and potential issues with other vehicle electrical systems.

2. What can cause the Hazard Switch Signal Short To Ground OBDII code in a Lincoln vehicle?

- The code B2071 can be caused by a short circuit in the wiring harness, a faulty hazard switch, or a malfunctioning body control module.

3. How can I diagnose the Hazard Switch Signal Short To Ground issue in my Lincoln?

- To diagnose this issue, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the wiring harness for any visible damage, and test the hazard switch for proper functionality.

4. Is it safe to continue driving my Lincoln with the B2071 OBDII code triggered?

- It is not recommended to drive the vehicle with the B2071 code triggered, as it can affect the proper operation of the hazard lights, which are essential for notifying other drivers of an emergency situation.

5. Can I repair the Hazard Switch Signal Short To Ground issue in my Lincoln myself?

- Depending on your level of expertise, you may be able to repair this issue yourself by replacing the faulty hazard switch, repairing the damaged wiring, or reprogramming the body control module.

6. Are there any common tips for repairing the B2071 code in a Lincoln vehicle?

- Some common repair tips include checking for any recalls related to the hazard switch system, ensuring all connections are secure, and consulting the vehicle's service manual for specific diagnostic procedures.

7. Will resetting the OBDII code B2071 clear the issue permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue, such as a short to ground, is not resolved, the code is likely to return.

8. How much does it typically cost to repair the Hazard Switch Signal Short To Ground issue in a Lincoln?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor at a dealership or repair shop.

9. Can a faulty hazard switch cause other electrical problems in my Lincoln?

- Yes, a faulty hazard switch can potentially cause other electrical issues in the vehicle, as it is connected to the body control module and can impact various systems.

10. Is the Hazard Switch Signal Short To Ground issue common in Lincoln vehicles?

- While not extremely common, the B2071 OBDII code related to the hazard switch signal short to ground can occur in Lincoln vehicles, especially in older models or those with electrical system issues.