AutoCodes – Generic – B1873

B1873 Code - Turn Signal / Hazard Power Feed Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Turn Signal / Hazard Switch. Common causes include Faulty Turn Signal / Hazard Switch, Turn Signal / Hazard Switch harness is open or shorted, Turn Signal / Hazard 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: B1873 indicates Turn Signal / Hazard Power Feed Circuit Short To Ground.
Common causes: Common causes include Faulty Turn Signal / Hazard Switch, Turn Signal / Hazard Switch harness is open or shorted, Turn Signal / Hazard 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 4,475

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 Jul 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1873 Description

The Body Control Module (BCM) monitors the Turn Signal / Hazard Switch. The BCM sets the OBDII code when the Turn Signal / Hazard Switch is not to factory specifications.

OBDII Code B1873 - Turn Signal / Hazard Power Feed Circuit Short To Ground - AutoCodes.com — B1873 Code - Turn Signal / Hazard Power Feed Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1873?

Faulty Turn Signal / Hazard Switch
Turn Signal / Hazard Switch harness is open or shorted
Turn Signal / Hazard Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1873?

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 B1873 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 B1873 code?

Need more information on how to fix the B1873 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1873 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 B1873 Code

1. What are the common symptoms of OBDII code B1873 (Turn Signal / Hazard Power Feed Circuit Short To Ground)?

- Common symptoms include non-functioning turn signals or hazards, flashing rapidly, or no response when using the turn signal or hazard switch.

2. What are the typical causes of OBDII code B1873?

- The code B1873 is usually caused by a short to ground in the power feed circuit of the turn signal or hazard system, which can be due to damaged wiring, faulty connections, or a malfunctioning component.

3. How can I diagnose the issue related to OBDII code B1873?

- To diagnose the issue, you can perform a visual inspection of the wiring and connectors, test the turn signal and hazard components for proper function, and use a multimeter to check for continuity and shorts in the circuit.

4. Can I still drive my vehicle with OBDII code B1873?

- It is not recommended to drive the vehicle with OBDII code B1873 as non-functioning turn signals or hazards can pose a safety hazard on the road. It is best to address the issue promptly.

5. How can I repair OBDII code B1873?

- Repairing OBDII code B1873 involves identifying and fixing the short to ground in the power feed circuit. This may require repairing or replacing damaged wiring, connectors, or components in the turn signal or hazard system.

6. Are there any DIY tips for fixing OBDII code B1873?

- While diagnosing and repairing electrical issues can be challenging, DIY enthusiasts with experience in automotive electrical systems can attempt to trace the short to ground and make necessary repairs. However, professional assistance is recommended for accurate diagnosis and safe repairs.

7. Do I need special tools to fix OBDII code B1873?

- Basic tools such as a multimeter, wire strippers, electrical tape, and a soldering iron may be needed to diagnose and repair OBDII code B1873. Specialized diagnostic tools may also be helpful in pinpointing the exact location of the short to ground.

8. Can weather conditions affect OBDII code B1873?

- Extreme weather conditions, such as moisture or corrosion, can contribute to electrical issues like a short to ground in the turn signal or hazard power feed circuit, leading to OBDII code B1873. Ensuring proper weatherproofing can help prevent such issues.

9. Will resetting the OBDII code B1873 clear the problem?

- Resetting the OBDII code B1873 may temporarily clear the error code, but if the underlying issue causing the short to ground is not addressed, the problem is likely to return. It is essential to diagnose and repair the root cause of the code.

10. How can I prevent OBDII code B1873 from occurring in the future?

- Regularly inspecting and maintaining the electrical components of the turn signal and hazard system, ensuring proper weatherproofing, and addressing any wiring or connection issues promptly can help prevent OBDII code B1873 from occurring in the future.