AutoCodes – RAM – P1644 RAM

P1644 RAM Code - Incorrect Variant/Configuration

Quick Answer

The Diagnostic Trouble Code (DTC) will set if the Transmission Control Module (TCM) detects that the variables that dictate the vehicle application are not present. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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: P1644 RAM indicates Incorrect Variant/Configuration.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) 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 724

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 21, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1644 RAM Description

The Diagnostic Trouble Code (DTC) will set if the Transmission Control Module (TCM) detects that the variables that dictate the vehicle application are not present.

OBDII Code P1644 RAM - Incorrect Variant/Configuration - AutoCodes.com — P1644 RAM Code - Incorrect Variant/Configuration

What does this mean?

What are the Possible Causes of the DTC P1644 RAM?

Faulty Transmission Control Module (TCM)
Transmission Control Module (TCM) harness is open or shorted
Transmission Control Module (TCM) circuit poor electrical connection

How to Fix the DTC P1644 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 P1644 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 P1644 RAM Code

1. What are the common symptoms of OBDII code P1644 RAM Incorrect Variant/Configuration?

The common symptoms include engine misfires, rough idling, reduced fuel efficiency, and potential stalling.

2. What can cause the OBDII code P1644 RAM Incorrect Variant/Configuration?

This code is typically triggered by issues with the Engine Control Module (ECM), faulty wiring or connectors, or a corrupted software update.

3. How can I diagnose the OBDII code P1644 RAM Incorrect Variant/Configuration?

Diagnosis involves using a scan tool to retrieve the fault code, inspecting the wiring and connectors for any damage, and checking for any recent software updates that may have caused the issue.

4. Can a DIY enthusiast repair the OBDII code P1644 RAM Incorrect Variant/Configuration?

While some simple fixes like checking and cleaning connectors or resetting the ECM may resolve the issue, it is recommended to consult a professional mechanic for a comprehensive diagnosis and repair.

5. How serious is the OBDII code P1644 RAM Incorrect Variant/Configuration?

Ignoring this code can lead to further damage to the engine and other components, potentially resulting in costly repairs if not addressed promptly.

6. Is it safe to continue driving with the OBDII code P1644 RAM Incorrect Variant/Configuration?

It is not recommended to drive with this code active, as it can affect the performance and reliability of your vehicle. It is advisable to have the issue addressed as soon as possible.

7. Can a faulty sensor trigger the OBDII code P1644 RAM Incorrect Variant/Configuration?

While a faulty sensor is not a common cause of this code, it is still worth checking the sensors related to the engine control system during the diagnostic process.

8. What are some repair tips for resolving the OBDII code P1644 RAM Incorrect Variant/Configuration?

Ensure all wiring and connectors are in good condition, check for any recent software updates that may have caused the issue, and consider resetting the ECM to see if the code clears.

9. How long does it typically take to repair the OBDII code P1644 RAM Incorrect Variant/Configuration?

The repair time can vary depending on the underlying cause of the code. Simple fixes may take a short amount of time, while more complex issues may require more extensive troubleshooting and repairs.

10. Can a software update fix the OBDII code P1644 RAM Incorrect Variant/Configuration?

In some cases, a software update provided by the vehicle manufacturer can resolve this code if it was triggered by a software-related issue. It is advisable to consult with a professional mechanic or dealership for guidance on software updates.