AutoCodes – Chrysler – P1D91 Chrysler

P1D91 Chrysler 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 Chrysler 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,532

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P1D91 Chrysler?

Faulty Transmission Internal Components

How to Fix the DTC P1D91 Chrysler?

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 Chrysler 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.

Need more information about the P1D91 Chrysler code?

Need more information on how to fix the P1D91 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1D91 Chrysler 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 Chrysler Code

1. What are the common symptoms of OBDII code P1D91 in a Chrysler vehicle?

The common symptoms of OBDII code P1D91 include the transmission slipping, difficulty shifting gears, decreased fuel efficiency, and the Check Engine light illuminating on the dashboard.

2. What does the OBDII code P1D91 in a Chrysler indicate?

OBDII code P1D91 indicates an Incorrect Gear Ratio Clutch 3 Defective issue in the transmission system of the Chrysler vehicle.

3. What are the possible causes of OBDII code P1D91 in a Chrysler?

Possible causes of OBDII code P1D91 in a Chrysler include a defective clutch, damaged transmission components, low transmission fluid level, or faulty transmission control module.

4. How can I diagnose the OBDII code P1D91 in my Chrysler vehicle?

Diagnosing OBDII code P1D91 in a Chrysler involves using an OBDII scanner to retrieve the code, inspecting the transmission system for any visible damage, and checking the transmission fluid level and quality.

5. Can I continue driving my Chrysler with OBDII code P1D91 present?

It is not recommended to continue driving your Chrysler with OBDII code P1D91 present, as it can lead to further damage to the transmission system and potentially result in a breakdown.

6. How can I repair OBDII code P1D91 in my Chrysler?

Repairing OBDII code P1D91 in a Chrysler may involve replacing the defective clutch, repairing or replacing damaged transmission components, ensuring the transmission fluid is at the correct level, and reprogramming the transmission control module if needed.

7. Is it safe to reset the OBDII code P1D91 in my Chrysler using a scanner?

Resetting OBDII code P1D91 in your Chrysler using a scanner may temporarily clear the code, but it is important to diagnose and address the underlying issue causing the code to prevent further problems with the transmission system.

8. Can a DIY enthusiast fix OBDII code P1D91 in a Chrysler?

While some basic inspection and maintenance tasks can be performed by a DIY enthusiast, diagnosing and repairing OBDII code P1D91 in a Chrysler may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. How much does it cost to repair OBDII code P1D91 in a Chrysler?

The cost to repair OBDII code P1D91 in a Chrysler can vary depending on the extent of the damage, parts needed for replacement, and labor costs. It is advisable to obtain quotes from different mechanics or repair shops for an accurate estimate.

10. How can I prevent OBDII code P1D91 from occurring in my Chrysler in the future?

To prevent OBDII code P1D91 from occurring in your Chrysler in the future, it is important to maintain regular transmission system inspections, keep up with scheduled maintenance, ensure proper fluid levels, and address any issues promptly.