Engine-Codes.com
Engine-Codes – Generic – P099F

P099F Code - Shift Solenoid 'H' Control Circuit High

Quick Answer

The P099F code indicates a problem with the Shift Solenoid 'H' Control Circuit in the vehicle's transmission system. Common causes include Faulty shift solenoid 'H', Damaged wiring or connectors in the control circuit, Malfunctioning 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
P099F indicates Shift Solenoid 'H' Control Circuit High.
Common causes
Common causes include Faulty shift solenoid 'H', Damaged wiring or connectors in the control circuit, Malfunctioning 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 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 P099F Description

The P099F code indicates a problem with the Shift Solenoid 'H' Control Circuit in the vehicle's transmission system. The shift solenoids are responsible for regulating the flow of transmission fluid to control gear shifting. In this case, a high voltage condition has been detected in the control circuit of solenoid 'H', which can lead to improper gear shifting, transmission slippage, and other performance issues.

OBDII Code P099F - Shift Solenoid 'H' Control Circuit High
P099F Code - Shift Solenoid 'H' Control Circuit High

Common Causes of P099F

  1. Faulty shift solenoid 'H'
  2. Damaged wiring or connectors in the control circuit
  3. Malfunctioning transmission control module (TCM)
  4. Low transmission fluid levels
  5. Electrical issues such as blown fuses or relays

Symptoms of P099F

  1. Harsh or rough shifting
  2. Delayed or erratic gear changes
  3. Transmission slipping
  4. Check Engine Light illuminated
  5. Reduced fuel efficiency

How to Fix P099F

  1. Diagnose the P099F code using a scan tool to pinpoint the exact cause of the issue.
  2. Inspect the shift solenoid 'H' and its wiring for any damage or corrosion.
  3. Test the transmission control module (TCM) to ensure it is functioning properly.
  4. Replace the faulty shift solenoid 'H' if necessary, and repair any damaged wiring or connectors.
  5. Clear the code and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P099F

The cost of repairing a Shift Solenoid 'H' Control Circuit High issue can vary depending on the specific cause of the problem and the make and model of the vehicle. Typically, the cost of replacing a shift solenoid can range from $150 to $400, including parts and labor. Additional costs may apply if other components need to be replaced or if extensive diagnostics are required.

Need more information about the P099F code?

Need more information on how to fix the P099F code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P099F code diagnosed by a professional: Find a repair shop in your area

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 P099F Code

No Frequently Asked Questions about P099F Code found.

Discuss the causes and fixes for P099F OBDII Code

Submit a New Comment

Code P099F comments

No comments found for this page.