P08C8
Pressure Control Solenoid M Control Circuit/Open
The TCM detects an open circuit in the control wiring of pressure control solenoid M. No current flows when the solenoid is commanded.
- 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.
- Open in solenoid control wireCommon
- Open solenoid coilPossible
- Pin pushed back out of connector bodyLess likely
Parts involved
- Pressure Control Solenoid M
- Wiring Harness
P08C8 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.