P0997 Fault Code

Shift Solenoid F Control Circuit Range/Performance

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0997 code indicates an issue with the Shift Solenoid F control circuit, which may be experiencing range or performance problems. The shift solenoid is a critical component in an automatic transmission, responsible for controlling the flow of transmission fluid and aiding in gear shifts. When this code is triggered, it often reflects a failure in the solenoid's ability to communicate effectively with the vehicle's control module.

What are the symptoms of the P0997 code?

You may experience various symptoms if your vehicle has a P0997 code, such as:

• Erratic shifting behavior or difficulty shifting gears
• Slipping transmission
• Warning lights illuminated on the dashboard, typically the check engine light
• Delayed engagement when shifting into drive or reverse
• Unusual noises or vibrations during shifting.

What causes the P0997 code?

Several factors can lead to the P0997 code being stored in the vehicle's diagnostic system, including:

• A faulty Shift Solenoid F
• Damaged wiring or connectors in the solenoid circuit
• Low transmission fluid levels or dirty fluid
• Issues with the transmission control module (TCM)
• Internal transmission problems.

How to fix P0997?

To resolve the P0997 code, the following steps may be undertaken:

• Inspect and repair or replace any damaged wiring or connectors associated with the Shift Solenoid F circuit.
• Check the transmission fluid level and condition; if low or contaminated, perform a fluid change.
• Test the Shift Solenoid F for proper functionality; replace if faulty.
• Consider inspecting the Transmission Control Module (TCM) for faults and reprogramming if necessary.
• If internal transmission problems are suspected, a professional assessment may be required.