AutoCodes – Dodge – P1634 Dodge

P1634 Dodge 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 Dodge 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 2,172

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 Dodge 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 Dodge - TCM Internal Watchdog Performance - AutoCodes.com — P1634 Dodge Code - TCM Internal Watchdog Performance

What does this mean?

What are the Possible Causes of the DTC P1634 Dodge?

Faulty Transmission Control Module (TCM)

How to Fix the DTC P1634 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 P1634 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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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 Dodge Code

1. What is OBDII code P1634 in a Dodge related to?

Code P1634 in a Dodge is known as "TCM Internal Watchdog Performance," indicating an issue with the Transmission Control Module's internal monitoring system.

2. What are the common symptoms of OBDII code P1634 in a Dodge?

Common symptoms of code P1634 may include transmission shifting issues, transmission slipping, stalling, and the illumination of the check engine light.

3. What are the possible causes of OBDII code P1634 in a Dodge?

Possible causes of code P1634 in a Dodge include a faulty Transmission Control Module (TCM), wiring issues, software glitches, or internal TCM malfunctions.

4. How do you diagnose OBDII code P1634 in a Dodge?

Diagnosing code P1634 typically involves using a diagnostic scanner to retrieve the code, checking for other related trouble codes, and performing a thorough inspection of the TCM and its connections.

5. Can I still drive my Dodge with OBDII code P1634 present?

It is not recommended to drive your Dodge with code P1634 present, as it can lead to further transmission damage and potential safety hazards. It is best to address the issue promptly.

6. How do you repair OBDII code P1634 in a Dodge?

Repairing code P1634 may involve resetting the TCM, checking and repairing any damaged wiring, updating the TCM software, or replacing the TCM if necessary.

7. Is it possible to reset OBDII code P1634 in a Dodge without professional help?

While you may be able to clear the code temporarily by disconnecting the battery, it is crucial to have the underlying issue diagnosed and repaired to prevent the code from reoccurring.

8. Will OBDII code P1634 in a Dodge cause permanent damage if left unaddressed?

Leaving code P1634 unaddressed can potentially cause further damage to the transmission system and may result in costly repairs down the line. It is advisable to address the issue promptly.

9. How much does it cost to fix OBDII code P1634 in a Dodge?

The cost of fixing code P1634 in a Dodge can vary depending on the specific cause of the issue. Repair costs may range from a simple wiring repair to the replacement of the Transmission Control Module.

10. Can a DIY enthusiast repair OBDII code P1634 in a Dodge?

While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing code P1634 often requires specialized tools and expertise. It is recommended to seek professional help for accurate diagnosis and repair.