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Engine-Codes – RAM – B1664 RAM

B1664 RAM Code - Rear Fog Lamp Control Circuit High

Quick Answer

The B1664 RAM code indicates a fault in the rear fog lamp control circuit, specifically a high voltage issue. Common causes include Faulty wiring or connections in the rear fog lamp circuit, Malfunctioning rear fog lamp switch or control module, Blown fuse related to the rear fog lamp circuit. 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 RAM indicates Rear Fog Lamp Control Circuit High.
Common causes
Common causes include Faulty wiring or connections in the rear fog lamp circuit, Malfunctioning rear fog lamp switch or control module, Blown fuse related to the rear fog lamp circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code B1664 RAM Description

The B1664 RAM code indicates a fault in the rear fog lamp control circuit, specifically a high voltage issue. The rear fog lamp is a safety feature on vehicles that improves visibility in adverse weather conditions, such as fog or heavy rain. When this control circuit malfunctions, it can lead to the rear fog lamp not functioning properly, which can reduce the visibility of the vehicle to other drivers on the road.

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

Common Causes of B1664 RAM

  1. Faulty wiring or connections in the rear fog lamp circuit
  2. Malfunctioning rear fog lamp switch or control module
  3. Blown fuse related to the rear fog lamp circuit
  4. Water intrusion or corrosion in the rear fog lamp components

Symptoms of B1664 RAM

  1. Rear fog lamp not turning on or staying on constantly
  2. Dashboard warning light indicating a fault in the rear fog lamp system
  3. Dim or flickering rear fog lamp
  4. Electrical burning smell coming from the rear of the vehicle

How to Fix B1664 RAM

  1. Begin by visually inspecting the rear fog lamp, wiring, and connections for any visible damage or corrosion.
  2. Check the rear fog lamp switch and control module for proper functioning and replace if necessary.
  3. Test the fuse related to the rear fog lamp circuit and replace if blown.
  4. Use a multimeter to diagnose the voltage levels in the rear fog lamp control circuit and identify the source of the high voltage issue.
  5. Repair or replace any faulty components identified during the diagnostic process.

Cost to Fix B1664 RAM

The typical repair costs for resolving a B1664 RAM code related to the rear fog lamp control circuit can vary depending on the specific cause of the issue. On average, the repair costs for this type of issue could range from $100 to $300, including parts and labor. However, it's essential to consider that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to consult with local auto repair shops for a more accurate 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 RAM Code

1. What are common symptoms of OBDII code B1664 RAM related to the Rear Fog Lamp Control Circuit High?

- Common symptoms include the rear fog lamp staying on constantly or not functioning at all.

2. What are some possible causes of OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High?

- Possible causes include a faulty fog lamp switch, wiring issues, a malfunctioning control module, or a short circuit.

3. How can I diagnose the issue causing OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High?

- You can use a multimeter to check the continuity of the wiring, test the fog lamp switch for proper operation, and inspect the control module for any signs of damage.

4. What are some repair tips for resolving OBDII code B1664 RAM related to the Rear Fog Lamp Control Circuit High?

- Start by checking and replacing any blown fuses, then inspect the wiring for any visible damage. Test the fog lamp switch and replace if necessary. If the issue persists, consider replacing the control module.

5. Can I drive my vehicle with OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High?

- It is generally safe to drive with this code, but it is recommended to address the issue promptly to ensure proper functionality of the rear fog lamp.

6. How much does it typically cost to repair OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High?

- The cost of repair can vary depending on the exact cause of the issue. Simple fixes like replacing a fuse or switch may be relatively inexpensive, while replacing a control module can be more costly.

7. Is it possible to reset OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High without repairs?

- Resetting the code without addressing the underlying issue may temporarily turn off the warning light, but the problem will likely reoccur until the root cause is fixed.

8. Are there any common DIY solutions for fixing OBDII code B1664 RAM related to the Rear Fog Lamp Control Circuit High?

- DIY solutions include checking and replacing fuses, inspecting wiring for damage, and testing the fog lamp switch. However, more complex repairs may require professional assistance.

9. Can extreme weather conditions cause OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High to trigger?

- Yes, extreme weather conditions such as heavy rain or snow can potentially lead to electrical issues that trigger this code. It is important to ensure that all components are properly sealed and protected.

10. How long does it typically take to resolve OBDII code B1664 RAM for the Rear Fog Lamp Control Circuit High?

- The time to resolve this code can vary depending on the complexity of the issue and the availability of parts. Simple fixes may take a few hours, while more involved repairs could take longer.

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