P0976 Fault Code

Shift Solenoid B Control Circuit Low

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

The P0976 code indicates a problem with the Shift Solenoid B Control Circuit, which is part of the automatic transmission system. This code typically indicates that the control circuit for the solenoid is operating at a lower voltage than expected, which can cause shifting issues in the transmission. Proper operation of shift solenoids is crucial for the seamless engagement of gears and overall vehicle performance.

What are the symptoms of the P0976 code?

Symptoms that may accompany the P0976 code include:

• Harsh or erratic shifting in the transmission
• Delayed engagement of gears
• Transmission slipping or not responding as expected
• Illuminated check engine light or transmission warning light on the dashboard
• Inability to shift into certain gears.

What causes the P0976 code?

Common causes of the P0976 fault code include:

• Faulty shift solenoid B
• Wiring issues, such as shorts or breaks in the electrical harness
• Poor connections at the solenoid or the transmission control module
• Transmission fluid issues, such as low fluid levels or contamination
• Malfunctioning transmission control module (TCM) that fails to send the correct signals.

How to fix P0976?

To resolve the P0976 code, follow these steps:

1. Inspect the wiring and connectors for the shift solenoid B; repair or replace any damaged components.
2. Check the transmission fluid level and quality; replace or top off fluid as necessary.
3. Test the shift solenoid B using a multimeter to ensure it is functioning within specifications; replace if faulty.
4. Clear the code and perform a test drive to verify the issue is resolved.
5. If problems persist, consider testing or replacing the transmission control module.