AutoCodes – Chrysler – B166B Chrysler

B166B Chrysler Code - Left Trailer Tow Lamp Control Circuit Low

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: B166B Chrysler indicates Left Trailer Tow Lamp Control Circuit Low.
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 1,047

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 B166B Chrysler 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 B166B Chrysler - Left Trailer Tow Lamp Control Circuit Low - AutoCodes.com — B166B Chrysler Code - Left Trailer Tow Lamp Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B166B Chrysler?

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 B166B Chrysler?

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 B166B Chrysler 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 more information on how to fix the B166B Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B166B Chrysler 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 B166B Chrysler Code

1. What are the common symptoms of OBDII code B166B Chrysler (Left Trailer Tow Lamp Control Circuit Low)?

The common symptoms include the left trailer tow lamp not functioning properly or not illuminating at all.

2. What are the possible causes of OBDII code B166B Chrysler?

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

3. How can I diagnose the root cause of OBDII code B166B Chrysler?

To diagnose the issue, you can visually inspect the left trailer tow lamp and its connections, test the wiring for continuity, and use a diagnostic scanner to check for fault codes and monitor the control module.

4. What should I do if I encounter OBDII code B166B Chrysler?

If you encounter this code, start by checking the left trailer tow lamp and its connections for any visible damage. If everything appears intact, consider seeking professional help for a thorough diagnosis and repair.

5. Can I continue driving with OBDII code B166B Chrysler present?

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

6. Are there any DIY repair tips for fixing OBDII code B166B Chrysler?

DIY repair tips may include checking and replacing any damaged wiring or connectors in the left trailer tow circuit, ensuring proper grounding, and testing the functionality of the trailer tow lamp.

7. How much does it typically cost to repair OBDII code B166B Chrysler?

The cost of repairing this code can vary depending on the root cause of the issue, the extent of the damage, and whether professional assistance is required. It's recommended to obtain estimates from local mechanics or repair shops.

8. Can weather conditions affect OBDII code B166B Chrysler?

Extreme weather conditions or exposure to moisture can potentially impact the left trailer tow lamp control circuit, leading to the triggering of this OBDII code.

9. Is it possible for OBDII code B166B Chrysler to occur intermittently?

Yes, intermittent occurrences of this code may occur if there are loose connections or intermittent faults in the left trailer tow lamp control circuit.

10. How can I prevent OBDII code B166B Chrysler from appearing in the future?

To prevent this code from appearing again, regularly inspect and maintain the trailer tow lamps and wiring, protect the connections from moisture and corrosion, and address any issues promptly to avoid further damage.