Pressure Control Solenoid "A" Short Circuit
The transmission's pressure control solenoid has an electrical short circuit, like a light switch that's stuck in the on position and won't respond properly. This prevents the transmission from controlling fluid pressure correctly, affecting shift quality and performance.
The ECU monitors the electrical resistance and current draw of the pressure control solenoid circuit. It expects specific resistance values and current patterns during solenoid operation. A short circuit causes abnormally low resistance and excessive current draw, triggering the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Circuit Resistance | 5-15 ohms | Less than 2 ohms (short detected) |
| Circuit Current Draw | 0.5-2.0 amps | Greater than 2.5 amps |
Code P1755 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, P1755 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.