P0976 Code: Shift Solenoid “B” Control Circuit Low

Reviewed by

William Guzenski, ASE Certified Master Automobile Technician

Contact Center Manager and Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on September 4th, 2023

Reading Time: 3 minutes
Summary
  • A problem with the shift solenoid or its circuit will cause the powertrain control module (PCM) to log a P0976 trouble code.
  • Low transmission fluid levels, a faulty solenoid, or issues with the transmission control module may cause this code to be logged.
  • If this code is present, your vehicle might exhibit symptoms like poor fuel economy and shifting problems.

Is your vehicle showing symptoms of a bad transmission? You should check if your vehicle’s powertrain control module (PCM) has stored any trouble codes by connecting a scan tool. If the P0976 code has been triggered, you can read this article to know the code’s definition and common causes and symptoms.

What Does the P0976 Code Mean?

Diagnostic trouble code (DTC) P0976 is defined as Shift Solenoid “B” Control Circuit Low. This code is triggered when the transmission control module (TCM) detects a shift solenoid isn’t performing properly. This code is meant to signify that the problem corresponds to the shift solenoid in the “B” circuit.

The P0976 code is triggered when the TCM detects a problem in the “B” circuit of the shift solenoid.

Shift solenoids are critical components of an automatic transmission because they direct hydraulic fluid through the transmission’s channels. Since the transmission relies on hydraulic fluid movement to shift gears, problems with the transmission’s shift solenoid can cause problems when it comes to shifting gears.

Note: The definition of the P0976 code can be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0976 Code?

The problems that trigger the P0976 code are the following:

  • Low transmission fluid levels
  • Failed transmission shift solenoid
  • Faulty wiring
  • Failed TCM or software in need of an update
  • An internal valve body or transmission failure

What are the Common Symptoms of the P0976 Code?

Your vehicle might exhibit the following symptoms when the P0976 code is triggered:

An internal issue with the valve body can trigger the P0976 code.

How to Diagnose the P0976 Code

Identifying the main cause of the P0976 code can be difficult because there are several components that you need to check. You might need special knowledge or tools to access and test parts like the shift solenoid and TCM. If you want to properly diagnose the P0976 code in your vehicle, it’s best to consult a professional.

If you’re interested in learning more about this issue and its diagnostic process, then you should check out this video:

How to Fix the P0976 Code

Want to fix the problems causing the P0976 code to trigger? You should try to find the culprit first. Otherwise, you might end up misdiagnosing the issue and not fixing the root cause. After finding the cause, you can look at reputable internet repair resources and how-to guides to learn how to fix it. You should rely on repair guides that correspond to your specific vehicle make and model since repair procedures for DTCs can vary greatly.

If you don’t have much experience diagnosing DTCs, you should consult a professional mechanic.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.