AutoCodes – Dodge – B166C Dodge

B166C Dodge Code - Left Trailer Tow Lamp Control Circuit High

Quick Answer

The Totally Integrated Power Module (TIPM) monitors the Left Trailer Tow Lamp Control. Common causes include Faulty Left Trailer Tow Lamp Bulb, Left Trailer Tow Lamp Bulb harness is open or shorted, Left 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: B166C Dodge indicates Left Trailer Tow Lamp Control Circuit High.
Common causes: Common causes include Faulty Left Trailer Tow Lamp Bulb, Left Trailer Tow Lamp Bulb harness is open or shorted, Left 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 949

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 B166C Dodge Description

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

OBDII Code B166C Dodge - Left Trailer Tow Lamp Control Circuit High - AutoCodes.com — B166C Dodge Code - Left Trailer Tow Lamp Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B166C Dodge?

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

How to Fix the DTC B166C Dodge?

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 B166C Dodge 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.

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Need Help with the Code?

Get the B166C Dodge 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 B166C Dodge Code

1. What are the common symptoms of OBDII code B166C Dodge (Left Trailer Tow Lamp Control Circuit High)?

The common symptoms include the left trailer tow lamp remaining constantly illuminated or flickering erratically.

2. What are the possible causes of OBDII code B166C Dodge?

Possible causes include a faulty trailer tow lamp, damaged wiring or connectors, a short circuit in the left trailer tow lamp circuit, or a malfunctioning control module.

3. How can I diagnose the issue related to OBDII code B166C Dodge?

You can start by visually inspecting the left trailer tow lamp, checking the wiring and connectors for damage, and using a multimeter to test for continuity and voltage in the circuit.

4. Can a blown fuse cause OBDII code B166C Dodge to trigger?

Yes, a blown fuse in the left trailer tow lamp circuit can cause the code to trigger. Make sure to check and replace any blown fuses as part of your troubleshooting process.

5. Is it safe to continue driving with OBDII code B166C Dodge present?

It is not recommended to continue driving with this code present, as it indicates a fault in the left trailer tow lamp circuit that may affect visibility and safety while towing.

6. What are some repair tips for fixing OBDII code B166C Dodge?

Repair tips include replacing the faulty trailer tow lamp, repairing any damaged wiring or connectors, resetting the control module, and ensuring proper grounding in the circuit.

7. Can I reset OBDII code B166C Dodge with a simple disconnecting of the battery?

Disconnecting the battery may temporarily reset the code, but it is not a permanent solution. It is important to diagnose and fix the underlying issue to prevent the code from reoccurring.

8. Do I need specialized equipment to repair OBDII code B166C Dodge?

While basic tools like a multimeter and wiring diagram can help diagnose the issue, specialized equipment like a scan tool may be necessary to reset the code and clear the fault from the system.

9. How do I prevent OBDII code B166C Dodge from coming back after repair?

To prevent the code from coming back, make sure to thoroughly inspect and repair the left trailer tow lamp circuit, follow proper repair procedures, and perform a system reset using a scan tool.

10. Can a DIY enthusiast fix OBDII code B166C Dodge, or should I consult a professional mechanic?

Depending on your skill level and access to tools, a DIY enthusiast may be able to fix this code by following proper diagnostic and repair procedures. However, consulting a professional mechanic is recommended if you are unsure or inexperienced in automotive electrical systems.