P0746 critical

Pressure Control Solenoid Performance or Stuck Off

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.

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Keep driving?: No -- stop driving
DIY difficulty: hard
Estimated cost: $200 - $900 (parts and labor)

Check Your Fluid First

ANCEL AD310 OBD-II Scanner

Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.

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Read Transmission Codes

LAUNCH CRP123X (Reads All Systems)

Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.

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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

Perform a line pressure test -- pressure may be too low or unregulated
Check transmission fluid level and condition
Command solenoid with scan tool and monitor pressure response
Inspect solenoid for contamination
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.