Shift Solenoid B Control Circuit Range/Performance (GM)
What does P1176 mean?
The P1176 code means the vehicle's onboard diagnostic system has detected: Shift Solenoid B Control Circuit Range/Performance (GM). This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Harsh or delayed shifting
- Transmission slipping
- Stuck in one gear
- Reduced fuel economy
Probable Causes (Ranked by Likelihood)
- Failed shift solenoid B Very High
- Low or contaminated transmission fluid High
- Wiring issue to the shift solenoid Moderate
- Internal transmission valve body wear Moderate
- TCM/PCM failure Low
Step-by-Step Diagnostic Procedure
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Check transmission fluid level and condition (dark or burnt fluid indicates problems)
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Use a scan tool to monitor shift solenoid operation and commanded vs actual gear
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Test shift solenoid B resistance with a multimeter
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Inspect wiring and connector to the solenoid for damage
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If solenoid tests good, inspect the valve body for wear or debris
Frequently Asked Questions
Can I drive with a shift solenoid problem?
You can drive short distances at low speed, but the transmission may not shift properly. Continued driving with a faulty shift solenoid can cause transmission overheating and further damage.
How much does it cost to replace a shift solenoid?
The solenoid itself costs $30 to $100. However, labor can be significant because the transmission pan must be dropped and the valve body accessed. Total repair typically runs $150 to $800 depending on the vehicle.
Should I change the transmission fluid at the same time?
Yes. Whenever the transmission pan is removed for solenoid replacement, it is advisable to change the fluid and filter. This removes debris and contaminants that may have contributed to the solenoid failure.