B166C Chrysler 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 Chrysler 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 Chrysler Description
What are the Possible Causes of the DTC B166C 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 B166C 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 B166C 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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Frequently Asked Questions about B166C Chrysler Code
1. What does the OBDII code B166C mean on a Chrysler vehicle?
The B166C code indicates an issue with the Left Trailer Tow Lamp Control Circuit, specifically detecting a high voltage condition.
2. What are the common symptoms of the B166C code?
Symptoms may include the left trailer tow lamp not functioning, other trailer lights behaving erratically, or a warning light on the dashboard.
3. What causes the B166C code to appear?
Common causes include a short to power in the wiring, a faulty trailer tow module, a damaged left trailer tow lamp, or poor electrical connections.
4. How do you diagnose the B166C code?
Diagnosis involves checking the wiring and connectors for damage, testing the trailer tow module, and inspecting the left trailer tow lamp for faults.
5. Can I still drive my vehicle with the B166C code active?
Yes, you can still drive the vehicle, but the trailer’s left tow lamp may not function, which could be a safety issue when towing.
6. How can I fix the B166C code?
Repairs may include replacing damaged wiring, repairing loose connections, replacing the left trailer tow lamp, or replacing the trailer tow module if it’s faulty.
7. Can a blown fuse cause the B166C code?
A blown fuse is unlikely to cause this specific high voltage code, but it’s worth checking the fuses related to the towing system as part of the diagnosis.
8. Do I need special tools to fix the B166C code?
Basic tools like a multimeter for checking voltage and continuity, along with access to a wiring diagram, are commonly needed for diagnosis and repair.
9. Is the B166C code covered under warranty?
Coverage depends on your vehicle’s warranty terms. Electrical system issues may be covered under a powertrain or bumper-to-bumper warranty if applicable.
10. Can a faulty trailer cause the B166C code?
Yes, a faulty trailer with damaged wiring or improper grounding can cause high voltage issues in the tow lamp circuit, triggering the code.
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