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P279C OBD2: Transfer Case Gear Neutral Incorrect Ratio

P279C OBD2: Transfer Case Gear Neutral Incorrect Ratio

The P279C code is an OBD-II trouble code that indicates an issue with the transfer case in a four-wheel-drive vehicle. Specifically, it signifies that the gear neutral ratio being detected is incorrect.

What Does the P279C Code Mean?

The P279C code indicates that the Transfer Case Control Module has detected that the transfer case is not providing the requested amount of torque. This can lead to the four-wheel drive system being disabled.

What Causes the P279C Code?

Several factors can lead to the P279C code being triggered, including:

  • Transfer case control module failure
  • Transfer case internal failure

What Are the Symptoms of the P279C Code?

The primary symptom associated with the P279C code is:

  • The four-wheel drive system being disabled

How Serious Is the P279C Code?

The P279C code is categorized as a moderate severity issue. While it may not pose an immediate threat to the vehicle’s safety, it is advisable to have it diagnosed and repaired within a reasonable timeframe to maintain optimal vehicle performance.

How to Diagnose the P279C Code

Diagnosing the P279C code typically involves the following steps:

  1. Using an OBD-II scanner to confirm the presence of the P279C code.
  2. Inspecting the transfer case for any visible issues.
  3. Testing the transfer case control module for proper operation.
  4. Checking for any other related codes that may provide additional context.

Common Repairs for the P279C Code

Repairing the P279C code may involve:

  • Replacing the transfer case control module
  • Repairing or replacing internal components of the transfer case
  • Ensuring all electrical connections are secure and free of corrosion

How Much Does It Cost to Fix the P279C Code?

The cost to fix the P279C code can vary widely based on the specific issue and the vehicle model. Generally, repairs can range from $200 to $1,500, depending on whether parts need to be replaced or if extensive labor is involved.

Can I Fix the P279C Code Myself?

While some basic troubleshooting and inspections can be performed by a knowledgeable DIYer, fixing the P279C code often requires specialized tools and expertise, particularly when it comes to the transfer case and its control module. It is recommended to seek assistance from a certified mechanic for a proper diagnosis and repair.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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