AutoCodes – RAM – B1668 RAM

B1668 RAM Code - Reverse Lamp Control Circuit High

Quick Answer

FRONT FOG LAMP CONTROL CIRCUIT HIGHThe Totally Integrated Power Module (TIPM) monitors the Reverse Lamp Control. Common causes include Faulty Reverse Lamp Bulb, Reverse Lamp Bulb harness is open or shorted, Reverse 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: B1668 RAM indicates Reverse Lamp Control Circuit High.
Common causes: Common causes include Faulty Reverse Lamp Bulb, Reverse Lamp Bulb harness is open or shorted, Reverse 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 896

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 B1668 RAM Description

FRONT FOG LAMP CONTROL CIRCUIT HIGHThe Totally Integrated Power Module (TIPM) monitors the Reverse Lamp Control. The TIPM sets the OBDII code when the Reverse Lamp Control is not to factory specifications.

OBDII Code B1668 RAM - Reverse Lamp Control Circuit High - AutoCodes.com — B1668 RAM Code - Reverse Lamp Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B1668 RAM?

Faulty Reverse Lamp Bulb
Reverse Lamp Bulb harness is open or shorted
Reverse Lamp Bulb circuit poor electrical connection
Faulty Totally Integrated Power Module (TIPM)

How to Fix the DTC B1668 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 B1668 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 B1668 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1668 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 B1668 RAM Code

1. What are the common symptoms of OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

The common symptoms of code B1668 include the reverse lights staying on constantly, even when the vehicle is not in reverse gear.

2. What causes the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

The code B1668 is typically caused by a faulty reverse lamp switch, a short circuit in the wiring, or a problem with the Body Control Module (BCM).

3. How can I diagnose the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

Diagnosing code B1668 involves checking the reverse lamp switch, inspecting the wiring for any shorts or damage, and testing the BCM for proper functionality using a diagnostic scan tool.

4. Can I continue driving with the OBDII code B1668 RAM (Reverse Lamp Control Circuit High) present?

While driving with code B1668 may not pose an immediate safety risk, it is recommended to address the issue promptly to avoid potential electrical problems or safety hazards due to malfunctioning reverse lights.

5. How can I repair the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

Repairing code B1668 typically involves replacing the faulty reverse lamp switch, repairing any damaged wiring, or reprogramming the BCM if needed.

6. Is it possible to reset the OBDII code B1668 RAM (Reverse Lamp Control Circuit High) without repairing the issue?

Resetting the code without addressing the underlying issue will likely result in the code reappearing once the vehicle is driven and the problem is detected again.

7. Are there any DIY tips for fixing the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

While some simple wiring checks can be done by DIY enthusiasts, diagnosing and repairing code B1668 may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

8. Can extreme weather conditions cause the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

Extreme weather conditions can potentially cause electrical issues that may trigger code B1668, such as water damage to wiring or components, so it's important to ensure proper weatherproofing of the vehicle's electrical system.

9. How long does it typically take to repair the OBDII code B1668 RAM (Reverse Lamp Control Circuit High)?

The repair time for code B1668 can vary depending on the specific cause of the issue, but it may take anywhere from 1 to 3 hours for a professional mechanic to diagnose and fix the problem.

10. Can I prevent the OBDII code B1668 RAM (Reverse Lamp Control Circuit High) from occurring in the future?

Regularly inspecting the vehicle's electrical system, including the reverse lamp circuit, and addressing any issues promptly can help prevent code B1668 from occurring in the future.