P0747
Pressure Control Solenoid A Stuck On
Pressure control solenoid A appears electrically commanded off but pressure feedback indicates it is stuck on. Line pressure stays high.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Common causes
Ordered by how often each turns out to be the cause.
- Solenoid stuck on mechanicallyCommon
- Valve body contaminationPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Pressure Control Solenoid
- Valve Body
P0747 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.