Engine-CodesJeep – B1664 Jeep

B1664 Jeep Code - Rear Fog Lamp Control Circuit High

Quick Answer

The B1664 Jeep code indicates a problem with the rear fog lamp control circuit being too high. Common causes include Faulty rear fog lamp switch, Short circuit in the wiring, Malfunctioning control module. 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
B1664 Jeep indicates Rear Fog Lamp Control Circuit High.
Common causes
Common causes include Faulty rear fog lamp switch, Short circuit in the wiring, Malfunctioning control module.
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.
Table of contents Created and updated by William Orellana on Sep 19, 2024
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Code B1664 Jeep Description

The B1664 Jeep code indicates a problem with the rear fog lamp control circuit being too high. Rear fog lamps are designed to improve visibility in adverse weather conditions, such as fog, rain, or snow, by emitting a bright red light that makes the vehicle more visible to other drivers. When this code is triggered, it means that the control circuit for the rear fog lamp is experiencing a higher voltage than normal, which can lead to various issues with the functionality of the rear fog lamp.

OBDII Code B1664 Jeep - Rear Fog Lamp Control Circuit High
B1664 Jeep Code - Rear Fog Lamp Control Circuit High

Common Causes of B1664 Jeep

  1. Faulty rear fog lamp switch
  2. Short circuit in the wiring
  3. Malfunctioning control module
  4. Problem with the rear fog lamp itself

Symptoms of B1664 Jeep

  1. Rear fog lamp staying on constantly
  2. Rear fog lamp not turning on at all
  3. Dashboard warning light indicating an issue with rear fog lamp
  4. Flickering of the rear fog lamp

How to Fix B1664 Jeep

  1. Begin by inspecting the rear fog lamp switch and wiring for any visible damage or loose connections.
  2. Test the control module to ensure it is functioning properly and sending the correct signals to the rear fog lamp.
  3. Check the rear fog lamp itself for any signs of damage or malfunction.
  4. If necessary, replace the rear fog lamp switch, repair any wiring issues, replace the control module, or install a new rear fog lamp.

Cost to Fix B1664 Jeep

The typical repair costs for addressing a B1664 Jeep code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of parts for this repair could range from $50 to $200, while labor costs could range from $100 to $300. It's important to keep in mind that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the shop's labor rates. It's recommended to consult with a qualified mechanic for a more accurate cost estimate.

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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 B1664 Jeep Code

1. What are the common symptoms of OBDII code B1664 in a Jeep related to the rear fog lamp control circuit high?

The common symptoms include the rear fog lamp not functioning properly, flickering, or staying on constantly.

2. What can cause the OBDII code B1664 in a Jeep indicating a rear fog lamp control circuit high?

Possible causes include a short circuit in the wiring, a faulty rear fog lamp switch, or a malfunctioning body control module.

3. How can I diagnose the OBDII code B1664 in my Jeep for the rear fog lamp control circuit high?

You can start by checking the wiring harness for any visible damage, testing the rear fog lamp switch for proper functionality, and using a multimeter to test the voltage in the circuit.

4. Is it safe to continue driving my Jeep with the OBDII code B1664 indicating a rear fog lamp control circuit high?

It is not recommended to drive with this issue as it may affect visibility to other drivers, especially in low-light conditions.

5. Can I repair the OBDII code B1664 in my Jeep related to the rear fog lamp control circuit high on my own?

If you have experience with automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair the issue. Otherwise, it's best to seek professional help.

6. Are there any temporary fixes I can try for the OBDII code B1664 in my Jeep until I can get it repaired?

You can try disconnecting the rear fog lamp to prevent any further electrical issues until you can have the problem properly diagnosed and repaired.

7. Will resetting the OBDII system clear the B1664 code related to the rear fog lamp control circuit high in my Jeep?

Resetting the system may clear the code temporarily, but if the underlying issue is not fixed, the code is likely to reappear.

8. How much does it typically cost to repair the OBDII code B1664 in a Jeep for the rear fog lamp control circuit high?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing wiring harnesses, switches, or the body control module, which can range from a few hundred to over a thousand dollars.

9. Can extreme weather conditions cause the OBDII code B1664 to trigger in a Jeep for the rear fog lamp control circuit high?

Extreme weather conditions, such as heavy rain or snow, can potentially damage the wiring or components related to the rear fog lamp control circuit, leading to the code being triggered.

10. How important is it to address the OBDII code B1664 in a Jeep indicating a rear fog lamp control circuit high promptly?

It is important to address this issue promptly not only for your safety on the road but also to prevent further damage to the electrical system of your vehicle.

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