AutoCodes – Generic – B166F

B166F Code - Right Trailer Tow Lamp Control Circuit Low

Quick Answer

The Totally Integrated Power Module (TIPM) monitors the Right Trailer Tow Lamp Control. Common causes include Faulty Right Trailer Tow Lamp Bulb, Right Trailer Tow Lamp Bulb harness is open or shorted, Right Trailer Tow Lamp Bulb 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: B166F indicates Right Trailer Tow Lamp Control Circuit Low.
Common causes: Common causes include Faulty Right Trailer Tow Lamp Bulb, Right Trailer Tow Lamp Bulb harness is open or shorted, Right Trailer Tow Lamp Bulb 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 1,696

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 Jun 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B166F Description

The Totally Integrated Power Module (TIPM) monitors the Right Trailer Tow Lamp Control. The TIPM sets the OBDII code when the Right Trailer Tow Lamp Control is not to factory specifications.

OBDII Code B166F - Right Trailer Tow Lamp Control Circuit Low - AutoCodes.com — B166F Code - Right Trailer Tow Lamp Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B166F?

Faulty Right Trailer Tow Lamp Bulb
Right Trailer Tow Lamp Bulb harness is open or shorted
Right Trailer Tow Lamp Bulb circuit poor electrical connection
Faulty Totally Integrated Power Module (TIPM)

How to Fix the DTC B166F?

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 B166F 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 B166F code?

Need more information on how to fix the B166F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B166F code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B166F Chrysler — Right Trailer Tow Lamp Control Circuit Low
B166F Dodge — Right Trailer Tow Lamp Control Circuit Low
B166F Jeep — Right Trailer Tow Lamp Control Circuit Low
B166F RAM — Right Trailer Tow Lamp Control Circuit Low

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 B166F Code

1. What are the common symptoms of OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low)?

- The common symptoms include the right trailer tow lamp not functioning properly or being dim, flickering, or completely out.

2. What are the possible causes of OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low)?

- The code may be triggered by issues such as a faulty trailer tow lamp, damaged wiring harness, poor electrical connection, or a problem with the control module.

3. How can I diagnose OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low)?

- Diagnose the code by visually inspecting the trailer tow lamp, checking the wiring for any visible damage, testing the electrical connections, and using a multimeter to measure voltage.

4. Can I still tow a trailer if OBDII code B166F is present?

- It is not recommended to tow a trailer if the right trailer tow lamp is not functioning properly, as it can pose a safety hazard to you and other drivers on the road.

5. How do I repair OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low)?

- To repair the code, you may need to replace the faulty trailer tow lamp, repair any damaged wiring, ensure proper electrical connections, or replace the control module if necessary.

6. Is it safe to continue driving with OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low) present?

- It is not advisable to continue driving with the code present, as it can affect visibility and safety while towing a trailer, especially in low light conditions or at night.

7. Why is it important to fix OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low) promptly?

- Promptly fixing the code is crucial to ensure proper functioning of the right trailer tow lamp, maintain safety while towing, and prevent potential issues with other electrical components.

8. Can OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low) affect other vehicle systems?

- While the code specifically relates to the right trailer tow lamp control circuit, unresolved electrical issues can potentially impact other vehicle systems over time, leading to more complex problems.

9. Do I need specialized tools to address OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low)?

- Basic automotive tools such as a multimeter, wiring diagram, and socket set are typically sufficient for diagnosing and repairing the issues related to this code.

10. How can I prevent OBDII code B166F (Right Trailer Tow Lamp Control Circuit Low) from recurring?

- Regularly inspecting the trailer tow lamp, maintaining the electrical system, and ensuring proper installation of trailer accessories can help prevent the code from recurring.