P0747: Pressure Control Solenoid 'A' Stuck On
Severity: high
What it means: The transmission computer sees pressure control solenoid 'A' staying on (stuck) when it should have changed state, so line pressure isn't being controlled as commanded.
Safe to drive? Not recommended until checked. Harsh shifts or a sudden downshift can happen, and some vehicles go into a limp mode.
Common symptoms
- Check-engine or transmission warning light
- Harsh or erratic shifts
- Limp mode, stuck in one gear
- Possible unexpected downshift
Likely causes, ranked
- Faulty pressure control solenoidShop
- Low, dirty or wrong transmission fluidShop
- Valve body or internal transmission faultShop
- Wiring or transmission computer faultShop
What it means: The transmission computer sees pressure control solenoid 'A' staying on (stuck) when it should have changed state, so line pressure isn't being controlled as commanded.
Severity: High. Safe to drive? Not recommended until checked. Harsh shifts or a sudden downshift can happen, and some vehicles go into a limp mode.
DIY or shop?
Shop. Have the fluid level and condition checked and the transmission scanned before replacing parts.
Before you replace parts
- Read all stored codes, including transmission codes, and note the fluid condition.
- Check your VIN for recalls, service bulletins and extended warranty coverage.
- Ask for the bulletin's inspection steps before agreeing to a full transmission replacement.
- Clear the code only after a repair, then confirm it stays off.
Safety / mechanic note
Verify with a mechanic. A transmission that downshifts or locks up unexpectedly can cause a loss of control. Check your VIN for open recalls. A code points to a circuit or system, not always a specific part.