Pressure Control Solenoid Intermittent
Your transmission's pressure control solenoid is cutting in and out intermittently, like a faulty light switch that flickers. This prevents the transmission from maintaining proper hydraulic pressure, causing shifting problems.
The ECM monitors solenoid coil resistance and current draw during activation cycles. It expects stable electrical signals and consistent pressure feedback from the transmission fluid pressure sensor when the solenoid commands engagement. Intermittent dropouts in current or erratic pressure readings trigger this code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Coil Resistance | 4-14 ohms depending on design | Open circuit (infinite) or shorted (<1 ohm) intermittently |
| Pressure Response Time | Pressure builds within 100-200ms of solenoid command | Delayed, erratic, or missing pressure spikes |
Code P0750 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, P0750 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.