Pressure Control Solenoid Performance or Stuck Off
What does P0746 mean?
The P0746 code means the vehicle's onboard diagnostic system has detected: Pressure Control Solenoid Performance or Stuck Off. This is a critical severity code.
Common Symptoms
- Check Engine Light illuminated
- Extremely harsh shifts
- Delayed engagement from Park/Neutral
- Transmission slipping under load
Probable Causes (Ranked by Likelihood)
- Pressure control solenoid stuck off Very High
- Clogged solenoid from contaminated fluid High
- Valve body wear in pressure control circuit Moderate
- Low transmission fluid level Moderate
Step-by-Step Diagnostic Procedure
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Perform a line pressure test -- pressure may be too low or unregulated
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Check transmission fluid level and condition
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Command solenoid with scan tool and monitor pressure response
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Inspect solenoid for contamination
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Replace pressure control solenoid or valve body as needed
Frequently Asked Questions
Can I drive with code P0746?
Do not drive -- have the vehicle towed. Pressure Control Solenoid Performance or Stuck Off can cause severe transmission damage if ignored.
What is the most common fix for P0746?
The most common fix is replacing the affected solenoid. In some cases, a transmission fluid flush and solenoid replacement resolves the issue. Internal torque converter or valve body damage requires more extensive repair.
Can I replace the solenoid myself?
On some vehicles, shift solenoids are accessible by removing the transmission pan. On others, the valve body must be removed. This is a moderate to hard DIY job requiring transmission fluid drainage and careful reassembly.