P0973 Fault Code

Shift Solenoid A Control Circuit Low

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

The P0973 fault code indicates an issue with the Shift Solenoid A control circuit. This circuit is crucial for the proper functioning of the automatic transmission, as it controls the engagement and disengagement of the transmission gears. When this code is triggered, it typically suggests that the control circuit for the shift solenoid is experiencing a low voltage condition, potentially resulting in erratic shifting or a failure to shift altogether.

What are the symptoms of the P0973 code?

Symptoms associated with the P0973 fault code may include:

• Hesitation or delays when changing gears
• Harsh or erratic shifting behavior
• Gear slip or inability to select a gear
• The check engine light illuminated on the dashboard
• Transmission overheating.

What causes the P0973 code?

Common causes for the P0973 code include:

• Faulty shift solenoid A
• Damaged wiring or connectors within the control circuit
• A malfunctioning transmission control module (TCM)
• Low transmission fluid levels or contaminated fluid
• Internal transmission issues that affect the solenoid's operation.

How to fix P0973?

To resolve the P0973 fault code, the following steps should be taken:

1. Inspect the wiring and connectors related to Shift Solenoid A for any signs of damage or corrosion.
2. Check the shift solenoid A functionality by testing its resistance with a multimeter and replacing it if necessary.
3. Ensure that the transmission fluid is at the correct level and is clean—replace or top-off as needed.
4. If issues persist, consider testing or replacing the TCM.
5. Clear the fault code and perform a test drive to ensure the issue is resolved.