Need a
Repair Manual?
P079F OBD2: Transmission Friction Element "F" Slip Detected

P079F OBD2: Transmission Friction Element “F” Slip Detected

The P079F code is an OBD-II trouble code that indicates a problem with the transmission, specifically related to friction element “F”. This code is related to the hybrid control module, which monitors the transmission clutches for slippage.

What Does the P079F Code Mean?

The P079F code means that the Hybrid Control Module has detected slippage in the transmission’s sixth clutch when it is activated. This can lead to issues with the transmission’s performance and may prompt the vehicle to enter a “limp home” mode to prevent further damage.

What Causes the P079F Code?

Several factors can trigger the P079F code, including:

  • Internal transmission failure
  • Low transmission fluid levels
  • Failure of the transmission valve body solenoid

What Are the Symptoms of the P079F Code?

Common symptoms associated with the P079F code include:

  • Transmission may not shift properly
  • Engine may enter limp home mode, resulting in reduced performance
  • Unusual noises from the transmission

How Serious Is the P079F Code?

The P079F code is categorized as an urgent issue. It indicates significant malfunctions that can lead to severe damage to the vehicle if not addressed promptly. It is crucial to diagnose and repair the problem as soon as possible to avoid further complications.

How to Diagnose the P079F Code

Diagnosing the P079F code involves a few steps:

  1. Use an OBD-II scanner to confirm the presence of the P079F code.
  2. Check the transmission fluid level and condition.
  3. Inspect the transmission valve body solenoid for proper operation.
  4. Look for any signs of internal transmission failure.
  5. Perform a visual inspection of the transmission system for any leaks or damages.

Common Repairs for the P079F Code

Repairs for the P079F code may include:

  • Replacing or repairing the transmission valve body solenoid
  • Refilling or replacing transmission fluid
  • Repairing or rebuilding the transmission if internal failure is found

How Much Does It Cost to Fix the P079F Code?

The cost to fix the P079F code can vary widely depending on the underlying issue. Simple repairs like fluid replacement may cost between $100 and $200, while more complex repairs, such as transmission rebuilds, can range from $1,500 to $4,000 or more.

Can I Fix the P079F Code Myself?

While some aspects of diagnosing and fixing the P079F code can be done at home, such as checking fluid levels, it is often recommended to seek professional help for more complex issues. Proper diagnosis requires specialized tools and knowledge, and attempting repairs without the right expertise may cause additional damage.

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.

Leave a Reply

Your email address will not be published. Required fields are marked *

;