B166C 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 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.
Code B166C Description
What are the Possible Causes of the DTC B166C?
- 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?
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 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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Information for Specific Makes
- B166C Chrysler — Left Trailer Tow Lamp Control Circuit High
- B166C Dodge — Left Trailer Tow Lamp Control Circuit High
- B166C Jeep — Left Trailer Tow Lamp Control Circuit High
- B166C RAM — Left Trailer Tow Lamp Control Circuit High
Frequently Asked Questions about B166C Code
1. What are the common symptoms of OBDII code B166C (Left Trailer Tow Lamp Control Circuit High)?
- Common symptoms include the left trailer tow lamp staying on continuously or not functioning properly.
2. What are the possible causes of OBDII code B166C?
- Possible causes include a faulty trailer tow lamp control module, wiring issues, or a malfunctioning switch.
3. How can I diagnose the cause of OBDII code B166C?
- You can diagnose the issue by inspecting the trailer tow lamp wiring, checking the control module for any damage, and testing the switch for proper functionality.
4. Can a blown fuse cause OBDII code B166C to appear?
- Yes, a blown fuse related to the trailer tow lamp circuit can trigger OBDII code B166C.
5. What is the recommended repair for OBDII code B166C?
- The recommended repair involves fixing any damaged wiring, replacing the faulty control module or switch, and ensuring all connections are secure.
6. Can a loose connection cause OBDII code B166C?
- Yes, a loose or poor connection in the trailer tow lamp circuit can lead to OBDII code B166C being triggered.
7. Is it safe to continue driving with OBDII code B166C present?
- It is not recommended to continue driving with OBDII code B166C active, as it can affect the proper functioning of the left trailer tow lamp.
8. How can I reset OBDII code B166C after making the necessary repairs?
- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.
9. Are there any preventive measures to avoid OBDII code B166C in the future?
- Regularly inspecting the trailer tow lamp system, keeping connections clean and tight, and addressing any issues promptly can help prevent OBDII code B166C from reoccurring.
10. Can extreme weather conditions contribute to OBDII code B166C?
- Yes, extreme weather conditions such as moisture or corrosion can affect the trailer tow lamp circuit and potentially trigger OBDII code B166C.
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