P08C9
Pressure Control Solenoid M Control Circuit Range/Performance
The current through pressure control solenoid M does not match the commanded value within tolerance. Coil resistance drift or high-resistance contact.
- 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.
- Coil resistance changed by thermal stressPossible
- High-resistance contact in solenoid connectorPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Pressure Control Solenoid M
- Wiring Harness
P08C9 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.