Pressure Control Solenoid C Control Circuit / Open
The transmission's pressure control solenoid C has a broken electrical connection or is not responding to commands. Think of it like a light switch that won't turn on—the wiring is there, but the circuit is open so electricity can't flow.
The ECU sends a control signal to solenoid C to modulate transmission fluid pressure during gear changes. It monitors the solenoid's response by measuring voltage feedback and coil resistance. If the circuit is open, no current flows and the ECU detects zero resistance or no voltage drop.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Coil Resistance | 5-15 ohms | Open circuit (infinite/very high resistance) |
| Control Signal Voltage | 12V PWM signal present | No voltage response or dropout |
Code P0968 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0968 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.