Shift Solenoid "B" Control Circuit Low
The P0976 code means the vehicle's onboard diagnostic system has detected: Shift Solenoid "B" Control Circuit Low. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $150 - $900 (external solenoid or wiring at the low end; internal transmission solenoid work at the high end)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light on
- Harsh, delayed, or missing shifts
- Transmission may enter limp mode (often locked in one gear)
- Symptoms can vary with fluid temperature
Probable Causes (Ranked by Likelihood)
- Failed Shift Solenoid "B" High
- Low or contaminated transmission fluid - the cheapest thing to rule out first High
- Wiring or connector fault at the transmission case connector Moderate
- Valve body wear or debris holding the solenoid circuit off-spec Moderate
Frequently Asked Questions
What does P0976 mean?
P0976 is a generic OBD-II code defined by SAE J2012 as "Shift Solenoid "B" Control Circuit Low". It means the control module detected the signal reading below its valid range - typically a short to ground or a failed component
Can I keep driving with P0976?
Short trips only. This fault can worsen or put the system into a protective mode without much warning, so have it diagnosed promptly.
Does P0976 mean the same thing on every car?
Yes. P0976 is in the generic (SAE J2012) range, so the definition is standardized across manufacturers. The specific component location and repair procedure still vary by vehicle - check your service information.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
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Check transmission fluid level and condition first - burnt or low fluid causes solenoid codes and is cheap to fix.
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Command the Shift Solenoid "B" with a capable scan tool and watch for a response.
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Measure solenoid resistance at the case connector against the service-manual spec.
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Inspect the external harness and case connector for damage and fluid intrusion.
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If electrical tests pass, the fault is internal - valve body or solenoid pack service.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- All OBD-II vehicles - this is a generic (SAE J2012) code with the same meaning across makes
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