AutoCodes – Chrysler – P1D99 Chrysler

P1D99 Chrysler Code - Incorrect Gear Ratio Clutch 'B' Or 'E' 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: P1D99 Chrysler indicates Incorrect Gear Ratio Clutch 'B' Or 'E' 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 2,550

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 19, 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 P1D99 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 fixed gear, during gear engagement, and during shifting from one gear to another.

OBDII Code P1D99 Chrysler - Incorrect Gear Ratio Clutch 'B' Or 'E' Defective - AutoCodes.com — P1D99 Chrysler Code - Incorrect Gear Ratio Clutch 'B' Or 'E' Defective

What does this mean?

What are the Possible Causes of the DTC P1D99 Chrysler?

Faulty Transmission Internal Components

How to Fix the DTC P1D99 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 P1D99 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 P1D99 Chrysler code?

Need more information on how to fix the P1D99 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1D99 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 P1D99 Chrysler Code

1. What are the common symptoms of OBDII code P1D99 on a Chrysler vehicle?

- Common symptoms may include difficulty shifting gears, transmission slipping, reduced fuel efficiency, and the Check Engine light illuminating.

2. What does the OBDII code P1D99 for Incorrect Gear Ratio Clutch 'B' Or 'E' Defective mean on a Chrysler?

- This code indicates a problem with the clutch 'B' or 'E' in the transmission, leading to incorrect gear ratio readings.

3. What are the possible causes of OBDII code P1D99 on a Chrysler?

- Potential causes include a defective clutch 'B' or 'E', low transmission fluid levels, a faulty transmission control module, or mechanical issues within the transmission.

4. How can I diagnose the OBDII code P1D99 on my Chrysler?

- Diagnosis typically involves using a professional OBDII scanner to read the code, inspecting the transmission components, checking fluid levels, and performing a thorough visual inspection.

5. Can I continue driving my Chrysler with the OBDII code P1D99 present?

- It is not recommended to continue driving with this code as it can lead to further damage to the transmission and result in costly repairs.

6. How can I repair OBDII code P1D99 on my Chrysler?

- Repair options may include replacing the defective clutch 'B' or 'E', topping up transmission fluid, resetting the transmission control module, or seeking assistance from a qualified mechanic.

7. Is it possible to reset the OBDII code P1D99 on a Chrysler without fixing the underlying issue?

- While you can clear the code temporarily, it's crucial to address the root cause to prevent ongoing transmission problems and potential safety hazards.

8. How much does it cost to repair OBDII code P1D99 on a Chrysler?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts, labor, and any necessary transmission repairs, ranging from a few hundred to over a thousand dollars.

9. Can a DIY enthusiast fix OBDII code P1D99 on a Chrysler at home?

- Depending on the skills and tools available, some DIY enthusiasts may be able to address simpler causes like low fluid levels, but more complex transmission issues may require professional expertise.

10. How can I prevent OBDII code P1D99 from appearing on my Chrysler in the future?

- Regular maintenance, timely transmission fluid changes, avoiding harsh driving habits, and promptly addressing any transmission issues can help prevent the recurrence of this code.