AutoCodes – Generic – C1492

C1492 Code - Power Transfer Unit Internal Performance

Quick Answer

The Drive Train Control Module (DTCM) monitors the Power Transfer Unit (PTU). Common causes include Faulty Power Transfer Unit (PTU) Actuator, Power Transfer Unit (PTU) Actuator harness is open or shorted, Power Transfer Unit (PTU) Actuator circuit poor electrical connection. 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: C1492 indicates Power Transfer Unit Internal Performance.
Common causes: Common causes include Faulty Power Transfer Unit (PTU) Actuator, Power Transfer Unit (PTU) Actuator harness is open or shorted, Power Transfer Unit (PTU) Actuator circuit poor electrical connection.
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 1,256

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 Oct 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1492 Description

The Drive Train Control Module (DTCM) monitors the Power Transfer Unit (PTU). The DTCM sets the OBDII code when it detects an internal failure in the Power Transfer Unit.

OBDII Code C1492 - Power Transfer Unit Internal Performance - AutoCodes.com — C1492 Code - Power Transfer Unit Internal Performance

What does this mean?

What are the Possible Causes of the DTC C1492?

Faulty Power Transfer Unit (PTU) Actuator
Power Transfer Unit (PTU) Actuator harness is open or shorted
Power Transfer Unit (PTU) Actuator circuit poor electrical connection

How to Fix the DTC C1492?

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 C1492 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 C1492 code?

Need more information on how to fix the C1492 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1492 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1492 Chrysler — Power Transfer Unit Internal Performance
C1492 Dodge — Power Transfer Unit Internal Performance
C1492 Jeep — Power Transfer Unit Internal Performance

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 C1492 Code

1. What does OBDII code C1492 mean?

Code C1492 indicates an internal performance issue with the Power Transfer Unit (PTU), which is responsible for transferring power from the transmission to other drivetrain components.

2. What are the common symptoms of code C1492?

Symptoms may include drivetrain noise, reduced vehicle performance, difficulty shifting, or the illumination of the check engine or all-wheel-drive warning lights.

3. What causes the C1492 code to appear?

The most common causes include PTU internal mechanical failure, low or contaminated PTU fluid, a faulty PTU sensor, or electrical issues such as damaged wiring or poor connections.

4. Can I drive my vehicle with code C1492?

It is not recommended to drive with this code active, as it could lead to further damage to the PTU or driveline components, potentially resulting in unsafe driving conditions.

5. How is code C1492 diagnosed?

A technician will typically scan the vehicle for stored codes, inspect the PTU for mechanical damage, check the fluid level and condition, and test associated wiring and sensors.

6. How do I fix the C1492 code?

Repairs may involve replacing the PTU, changing the PTU fluid, repairing or replacing damaged wiring, or addressing faulty sensors within the unit.

7. How much does it cost to repair a Power Transfer Unit for code C1492?

The cost can vary widely, but replacing a PTU may range from $1,000 to $2,500, depending on the vehicle make, model, and labor costs.

8. Can low fluid in the PTU cause the C1492 code?

Yes, low or degraded fluid can lead to internal performance issues in the PTU and trigger the C1492 code.

9. Is C1492 specific to certain vehicles?

While the code may appear on various makes and models, it is commonly associated with vehicles equipped with all-wheel-drive or four-wheel-drive systems.

10. How can I prevent the C1492 code from occurring?

Regular maintenance, including checking and replacing PTU fluid as recommended by the manufacturer, can help prevent internal performance issues and the associated code.