AutoCodes – RAM – B166F RAM

B166F RAM 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 RAM 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 727

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

What does this mean?

What are the Possible Causes of the DTC B166F RAM?

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 RAM?

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 RAM 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 RAM code?

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

Need Help with the Code?

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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 B166F RAM Code

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

- Common symptoms include the right trailer tow lamp not working, dim or flickering trailer lights, or a warning light on the dashboard.

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

- Possible causes include a faulty trailer tow lamp, damaged wiring or connectors, a blown fuse, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- Use a multimeter to test the trailer tow lamp, inspect the wiring and connectors for damage, check the fuse related to the trailer lights, and scan the control module for any faults.

4. What should I do if I encounter OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- Start by checking the trailer tow lamp and its connections, then inspect the wiring for any damage. Replace any faulty components and clear the code to see if the issue is resolved.

5. Are there any repair tips for fixing OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- Ensure the trailer tow lamp is securely connected and functioning properly, check for any corrosion in the wiring, and use dielectric grease on connectors to prevent future issues.

6. Can OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low be fixed at home?

- Depending on your level of expertise, you may be able to fix this issue at home by checking and repairing the trailer tow lamp, wiring, and connectors. However, professional help may be needed for more complex problems.

7. Is it safe to drive with OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- It is not recommended to drive with this code active, as it indicates a problem with the trailer tow lamp control circuit that can affect visibility and safety while towing a trailer.

8. How much does it typically cost to repair OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- Repair costs can vary depending on the cause of the issue. Replacing a faulty trailer tow lamp or repairing damaged wiring may cost between $50 to $200, while fixing a control module can be more expensive.

9. Can weather conditions affect OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- Extreme weather conditions, such as heavy rain or snow, can potentially damage the trailer tow lamp or its connections, leading to the triggering of this fault code.

10. Can a temporary fix be applied for OBDII code B166F RAM for the Right Trailer Tow Lamp Control Circuit Low?

- While temporary fixes like securing loose connections or replacing a blown fuse may temporarily resolve the issue, it is recommended to properly diagnose and repair the root cause to prevent future occurrences.