P0746: Pressure Control Solenoid A Performance or Stuck Off
The P0746 code indicates that the transmission control module (TCM) has detected a malfunction in the pressure control solenoid 'A', which regulates hydraulic pressure within the automatic transmission. This solenoid is responsible for controlling line pressure or shift pressure. When it fails or sticks in the 'off' position, the transmission may experience harsh shifts, slipping, or fail to engage gears properly. The code is set when the TCM detects an electrical or mechanical issue, such as a short circuit, open circuit, or stuck valve.
01. Most Common Causes
- Faulty pressure control solenoid A
- Low or dirty transmission fluid
- Wiring or connector issues in the solenoid circuit
- Internal transmission mechanical failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Harsh or delayed gear shifts
- Transmission slipping or overheating
- Reduced fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and check transmission fluid level and condition.
Step 2: Inspect wiring and connectors for damage or corrosion.
Step 3: Test solenoid resistance and operation using a multimeter.
Step 4: Perform a transmission pressure test to confirm solenoid function.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause further transmission damage. Limited driving to a repair shop is acceptable if the transmission is not slipping severely.
How much does it cost to fix?▼
The cost ranges from $50 to $150 for DIY solenoid replacement, or $200 to $500 for professional repair including labor and fluid change.