AutoCodes – RAM – B1664 RAM

B1664 RAM Code - Rear Fog Lamp Control Circuit High

Quick Answer

The Totally Integrated Power Module (TIPM) monitors the Rear Fog Lamp Control. Common causes include Faulty Left or Right Rear Fog Lamp Bulb, Left or Right Rear Fog Lamp Bulb harness is open or shorted, Left or Right Rear Fog 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: B1664 RAM indicates Rear Fog Lamp Control Circuit High.
Common causes: Common causes include Faulty Left or Right Rear Fog Lamp Bulb, Left or Right Rear Fog Lamp Bulb harness is open or shorted, Left or Right Rear Fog 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 747

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 B1664 RAM Description

The Totally Integrated Power Module (TIPM) monitors the Rear Fog Lamp Control. The TIPM sets the OBDII code when the Rear Fog Lamp Control is not to factory specifications.

OBDII Code B1664 RAM - Rear Fog Lamp Control Circuit High - AutoCodes.com — B1664 RAM Code - Rear Fog Lamp Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B1664 RAM?

Faulty Left or Right Rear Fog Lamp Bulb
Left or Right Rear Fog Lamp Bulb harness is open or shorted
Left or Right Rear Fog Lamp Bulb circuit poor electrical connection
Faulty Totally Integrated Power Module (TIPM)

How to Fix the DTC B1664 RAM?

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 B1664 RAM 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 B1664 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1664 RAM 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 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.