What Does the P099A Code Mean?
The P099A code refers to a Shift Solenoid “G” Control Circuit Range/Performance issue. This code is triggered when the engine’s control module (PCM) or transmission control module (TCM) identifies an issue with the electrical circuit associated with the transmission fluid pressure solenoid.
What Causes the P099A Code?
Several factors can contribute to the P099A code being set. Common causes include:
- Faulty Transmission Control Module (TCM)
- Low transmission fluid level
- Malfunctioning transmission shift solenoid
- Wiring issues affecting the solenoid
What Are the Symptoms of the P099A Code?
Drivers may notice various symptoms when the P099A code is present, including:
- Transmission may not shift properly
- Increased fuel consumption
How Serious Is the P099A Code?
The P099A code is classified as urgent and should be addressed immediately. Ignoring this code can lead to significant damage to the vehicle’s transmission or create unsafe driving conditions.
How to Diagnose the P099A Code
To accurately diagnose the P099A code, a mechanic typically follows these steps:
- Use an OBD-II scanner to confirm the code and check for any additional trouble codes.
- Inspect the transmission fluid level and condition.
- Examine the wiring and connectors associated with the transmission fluid pressure solenoid.
- Test the shift solenoid and TCM for proper functionality.
Common Repairs for the P099A Code
Depending on the diagnosis, potential repairs for the P099A code may include:
- Replacing a faulty transmission control module (TCM)
- Refilling or changing the transmission fluid
- Repairing or replacing the transmission shift solenoid
- Fixing wiring issues or replacing damaged connectors
How Much Does It Cost to Fix the P099A Code?
Repair costs can vary significantly depending on the specific issue. On average, you may expect to pay between $100 to $1,500 to fix the P099A code, depending on whether you need a simple fluid change or a more extensive repair like replacing the TCM.
Can I Fix the P099A Code Myself?
If you have automotive repair experience, you may be able to address some issues related to the P099A code yourself, such as checking fluid levels or inspecting wiring. However, for more complex repairs, such as replacing the TCM or diagnosing electrical issues, it is advisable to consult a professional mechanic.
