AutoCodes – Dodge – P1D91 Dodge

P1D91 Dodge Code - Incorrect Gear Ratio Clutch 3 Defective

Quick Answer

The Transmission Control Module (TCM) monitors for conditions which lead to an unexpected transmission gear ratio (e.g. Common causes include Faulty Transmission Internal Components. 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: P1D91 Dodge indicates Incorrect Gear Ratio Clutch 3 Defective.
Common causes: Common causes include Faulty Transmission Internal Components.
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 5,703

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 Apr 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1D91 Dodge Description

The Transmission Control Module (TCM) monitors for conditions which lead to an unexpected transmission gear ratio (e.g. slipping clutches, hydraulic or mechanical defects, etc.). The TCM compares the actual gear ratio (i.e. the ratio of input speed to output speed) to a minimum and maximum calibrated gear ratio value. The TCM performs this comparison while driving in a fix gear, during gear engagement, and during shifting from one gear to another.

OBDII Code P1D91 Dodge - Incorrect Gear Ratio Clutch 3 Defective - AutoCodes.com — P1D91 Dodge Code - Incorrect Gear Ratio Clutch 3 Defective

What does this mean?

What are the Possible Causes of the DTC P1D91 Dodge?

Faulty Transmission Internal Components

How to Fix the DTC P1D91 Dodge?

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 P1D91 Dodge 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 Help with the Code?

Get the P1D91 Dodge 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 P1D91 Dodge Code

1. What are the common symptoms of OBDII code P1D91 in a Dodge related to Incorrect Gear Ratio Clutch 3 Defective?

Symptoms may include harsh shifting, transmission slipping, poor acceleration, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P1D91 in a Dodge indicating Incorrect Gear Ratio Clutch 3 Defective?

Potential causes include a faulty clutch 3, issues with the transmission control module, damaged wiring or connectors, or low transmission fluid levels.

3. How can I diagnose OBDII code P1D91 in a Dodge for Incorrect Gear Ratio Clutch 3 Defective?

Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the transmission system for any visible damage, and testing the clutch 3 for proper functionality.

4. Can I continue driving my Dodge with OBDII code P1D91 indicating Incorrect Gear Ratio Clutch 3 Defective?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission system and potential safety hazards.

5. How can I repair OBDII code P1D91 in a Dodge related to Incorrect Gear Ratio Clutch 3 Defective?

Repair options may include replacing the faulty clutch 3, repairing or replacing damaged wiring or connectors, resetting the transmission control module, and ensuring proper transmission fluid levels.

6. Is it possible to clear OBDII code P1D91 in a Dodge indicating Incorrect Gear Ratio Clutch 3 Defective without repairs?

While clearing the code may temporarily remove the warning light, it is important to address the underlying issue to prevent further transmission problems.

7. How much does it typically cost to repair OBDII code P1D91 in a Dodge for Incorrect Gear Ratio Clutch 3 Defective?

Costs can vary depending on the exact cause of the issue, but repairs for this code can range from a few hundred to a few thousand dollars, including parts and labor.

8. Are there any preventive maintenance tips to avoid OBDII code P1D91 in a Dodge related to Incorrect Gear Ratio Clutch 3 Defective?

Regularly servicing the transmission, checking transmission fluid levels, and addressing any unusual shifting behaviors promptly can help prevent issues that trigger this code.

9. Can a DIY enthusiast fix OBDII code P1D91 in a Dodge indicating Incorrect Gear Ratio Clutch 3 Defective?

While some basic troubleshooting steps can be done by a DIY enthusiast, repairing this code often requires specialized tools and expertise, so it is recommended to consult a professional mechanic.

10. How long does it take to repair OBDII code P1D91 in a Dodge for Incorrect Gear Ratio Clutch 3 Defective?

The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a mechanic to diagnose and address the problem associated with this code.