AutoCodes – Chrysler – P1634 Chrysler

P1634 Chrysler Code - TCM Internal Watchdog Performance

Quick Answer

This diagnostic runs continuously with the ignition on. Common causes include Faulty Transmission Control Module (TCM). 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: P1634 Chrysler indicates TCM Internal Watchdog Performance.
Common causes: Common causes include Faulty Transmission Control Module (TCM).
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 4,432

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 P1634 Chrysler Description

This diagnostic runs continuously with the ignition on. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module (TCM) has detected an internal failure.

OBDII Code P1634 Chrysler - TCM Internal Watchdog Performance - AutoCodes.com — P1634 Chrysler Code - TCM Internal Watchdog Performance

What does this mean?

What are the Possible Causes of the DTC P1634 Chrysler?

Faulty Transmission Control Module (TCM)

How to Fix the DTC P1634 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 P1634 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.

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Get the P1634 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 P1634 Chrysler Code

1. What are the common symptoms of OBDII code P1634 in a Chrysler related to TCM Internal Watchdog Performance?

- Common symptoms include transmission shifting issues, engine stalling, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P1634 in a Chrysler related to TCM Internal Watchdog Performance?

- Possible causes include a faulty Transmission Control Module (TCM), wiring issues, poor connections, or a software problem within the TCM.

3. How can I diagnose OBDII code P1634 in a Chrysler related to TCM Internal Watchdog Performance?

- Diagnosis typically involves using a diagnostic scanner to retrieve the code, checking for any other related codes, and performing a thorough inspection of the TCM and its wiring.

4. Can I continue driving my Chrysler with OBDII code P1634 related to TCM Internal Watchdog Performance?

- It is not recommended to drive the vehicle with this code present, as it may lead to further transmission and engine issues. It is best to address the problem promptly.

5. How can I repair OBDII code P1634 in a Chrysler related to TCM Internal Watchdog Performance?

- Repair options may include replacing the TCM if it is faulty, repairing any damaged wiring or connections, and updating the TCM software if needed.

6. Is it necessary to reset the OBDII code P1634 after repairing the issue in a Chrysler?

- Yes, after repairing the underlying problem causing the code, it is important to clear the code using a diagnostic scanner to reset the Check Engine Light.

7. Can a DIY enthusiast address OBDII code P1634 in a Chrysler related to TCM Internal Watchdog Performance?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides and utilizing diagnostic equipment.

8. What are the potential long-term effects of ignoring OBDII code P1634 related to TCM Internal Watchdog Performance in a Chrysler?

- Ignoring this code may lead to more severe transmission issues, engine problems, increased fuel consumption, and potential safety hazards while driving.

9. Are there any preventive measures to avoid OBDII code P1634 related to TCM Internal Watchdog Performance in a Chrysler?

- Regular maintenance, such as checking and maintaining the TCM and transmission components, ensuring good electrical connections, and addressing any warning signs promptly, can help prevent this code from appearing.

10. How much does it typically cost to repair OBDII code P1634 related to TCM Internal Watchdog Performance in a Chrysler?

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