Engine-Codes.com
Engine-Codes – Generic – C1979

C1979 Code - IWE Solenoid Circuit Failure

Quick Answer

The C1979 code indicates a failure in the Integrated Wheel End (IWE) solenoid circuit. Common causes include Faulty IWE solenoid, Wiring issues or shorts in the solenoid circuit, Corrosion or debris affecting solenoid operation. 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
C1979 indicates IWE Solenoid Circuit Failure.
Common causes
Common causes include Faulty IWE solenoid, Wiring issues or shorts in the solenoid circuit, Corrosion or debris affecting solenoid operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code C1979 Description

The C1979 code indicates a failure in the Integrated Wheel End (IWE) solenoid circuit. The IWE system is responsible for engaging and disengaging the front wheel hubs on four-wheel-drive vehicles. When the solenoid circuit fails, it can lead to issues with the engagement of the front wheels, affecting the vehicle's performance, especially in off-road or slippery road conditions. This failure can result in a loss of four-wheel-drive functionality, reduced traction, and potential damage to the drivetrain if not addressed promptly.

OBDII Code C1979 - IWE Solenoid Circuit Failure
C1979 Code - IWE Solenoid Circuit Failure

Common Causes of C1979

  1. Faulty IWE solenoid
  2. Wiring issues or shorts in the solenoid circuit
  3. Corrosion or debris affecting solenoid operation
  4. Mechanical failure in the IWE system components
  5. Water intrusion into the solenoid or wiring connections

Symptoms of C1979

  1. Four-wheel-drive system not engaging properly
  2. Grinding or clicking noises from the front end of the vehicle
  3. Reduced traction or difficulty driving in slippery conditions
  4. Dashboard warning light indicating a four-wheel-drive system fault
  5. Uneven tire wear due to improper engagement of front wheels

How to Fix C1979

  1. Diagnose the issue by checking the wiring and connections for any damage or corrosion.
  2. Test the IWE solenoid for proper operation using a multimeter.
  3. Replace the faulty IWE solenoid if it fails the test.
  4. Clear the diagnostic trouble codes from the vehicle's computer.
  5. Test the four-wheel-drive system to ensure proper engagement and functionality.

Cost to Fix C1979

The typical repair costs for addressing a C1979 code can range from $150 to $400, depending on the extent of the issue and the cost of parts. This estimate includes the cost of a new IWE solenoid, any necessary wiring repairs, and labor charges. It's important to note that actual repair costs can vary based on the specific vehicle make and model, as well as the location and labor rates of the auto repair shop. It's recommended to obtain a detailed quote from a trusted mechanic before proceeding with the repair.

Need more information about the C1979 code?

Need more information on how to fix the C1979 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1979 code diagnosed by a professional: Find a repair shop in your area

Code C1979 Information for Specific Makes

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 C1979 Code

1. What are the common symptoms of a C1979 IWE Solenoid Circuit Failure OBDII code?

- Common symptoms include difficulty shifting gears, noisy operation from the front end of the vehicle, and noticeable reduction in four-wheel drive performance.

2. What can cause a C1979 IWE Solenoid Circuit Failure code to trigger?

- The code can be triggered by a faulty IWE (Integrated Wheel End) solenoid, damaged wiring in the solenoid circuit, or a malfunction in the four-wheel drive system.

3. How serious is a C1979 OBDII code related to IWE Solenoid Circuit Failure?

- Ignoring the code can lead to reduced four-wheel drive functionality and potential damage to other components in the system. It is recommended to address the issue promptly.

4. Are there any DIY repair tips for fixing a C1979 IWE Solenoid Circuit Failure?

- DIY repair tips may include checking the wiring harness for any visible damage, ensuring proper connections to the solenoid, and testing the solenoid itself for proper functionality.

5. Can a C1979 OBDII code be temporarily reset to see if the issue resolves on its own?

- While resetting the code may temporarily clear the warning light, it is not a permanent solution. It is important to diagnose and address the root cause of the issue.

6. How can a mechanic diagnose a C1979 IWE Solenoid Circuit Failure error code?

- A mechanic can use an OBDII scanner to read the code, inspect the IWE solenoid and wiring for physical damage, and perform electrical tests to pinpoint the exact cause of the failure.

7. Is it safe to drive with a C1979 OBDII code related to IWE Solenoid Circuit Failure?

- It is generally safe to drive with this code, but it is recommended to avoid engaging four-wheel drive until the issue is resolved to prevent further damage.

8. How much does it typically cost to repair a C1979 IWE Solenoid Circuit Failure issue?

- The cost of repair can vary depending on the underlying cause, but it may range from $150 to $400, including parts and labor.

9. Can extreme weather conditions impact the likelihood of a C1979 OBDII code appearing?

- Yes, extreme cold or wet conditions can exacerbate issues with the IWE solenoid circuit, potentially leading to the triggering of the C1979 code.

10. Are there any preventive measures to avoid encountering a C1979 IWE Solenoid Circuit Failure in the future?

- Regular inspection and maintenance of the four-wheel drive system, including checking the IWE solenoid and wiring, can help prevent the recurrence of the C1979 code.

Discuss the causes and fixes for C1979 OBDII Code

Submit a New Comment

Code C1979 comments

No comments found for this page.