AutoCodes – RAM – P1666 RAM

P1666 RAM Code - Cruise Control Module Internal

Quick Answer

This diagnosis runs continuously when the engine is running. Common causes include Faulty Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise Control Moduler 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: P1666 RAM indicates Cruise Control Module Internal.
Common causes: Common causes include Faulty Cruise Control Module, Cruise Control Module harness is open or shorted, Cruise Control Moduler 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 311

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 Mar 23, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1666 RAM Description

This diagnosis runs continuously when the engine is running. The Module regularly performs internal controller diagnostic tests, and Diagnostic Trouble Code (DTC) will be set when an internal hardware failure has been detected.

OBDII Code P1666 RAM - Cruise Control Module Internal - AutoCodes.com — P1666 RAM Code - Cruise Control Module Internal

What does this mean?

What are the Possible Causes of the DTC P1666 RAM?

Faulty Cruise Control Module
Cruise Control Module harness is open or shorted
Cruise Control Moduler circuit poor electrical connection

How to Fix the DTC P1666 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 P1666 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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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 P1666 RAM Code

1. What are the common symptoms of OBDII code P1666 RAM titled Cruise Control Module Internal?

- Common symptoms include non-functional cruise control, illuminated check engine light, and possible engine performance issues.

2. What are the possible causes of OBDII code P1666 RAM?

- The code P1666 RAM may be caused by a faulty cruise control module, wiring issues, or a problem with the vehicle's computer system.

3. How can I diagnose the cause of OBDII code P1666 RAM?

- Diagnosing the code may involve checking the cruise control module for proper operation, inspecting related wiring for damage, and using a scan tool to read the code.

4. Can I still drive my vehicle with OBDII code P1666 RAM?

- While it is possible to drive the vehicle with this code, it is recommended to address the issue promptly to prevent potential safety and performance issues.

5. How can I repair OBDII code P1666 RAM?

- Repair options may include replacing the cruise control module, repairing damaged wiring, or resetting the vehicle's computer system to clear the code.

6. Is it safe to continue using the cruise control if OBDII code P1666 RAM is present?

- It is not recommended to use the cruise control if this code is present, as it indicates a potential issue with the cruise control module that could affect its operation.

7. Can OBDII code P1666 RAM cause other problems in the vehicle?

- While the code itself may not cause other problems, addressing the underlying issue promptly can prevent potential issues with the cruise control system and ensure proper vehicle operation.

8. How much does it typically cost to repair OBDII code P1666 RAM?

- Repair costs can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I reset the OBDII code P1666 RAM myself?

- You can attempt to clear the code using an OBDII scan tool, but it is important to address the underlying issue to prevent the code from reoccurring.

10. Will OBDII code P1666 RAM affect my vehicle's emissions or fuel efficiency?

- While the code itself may not directly impact emissions or fuel efficiency, it is still important to address the issue to ensure optimal vehicle performance and compliance with emissions regulations.