PSPS Out Of Self Test Range
The Power Steering Pressure Switch (PSPS) sensor is reading outside its normal operating range during the vehicle's self-test cycle. Think of it like a pressure gauge that's not responding correctly when the system checks itself.
The ECU monitors the Power Steering Pressure Switch to detect when hydraulic pressure changes during steering input. During self-test, the ECU expects the switch to toggle between on and off states within specific voltage and pressure thresholds. If the signal remains static or fluctuates outside expected parameters, the code sets.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Switch voltage during self-test | 0.2V to 4.8V (toggling between states) | Stays above 4.8V or below 0.2V; no state change detected |
| Pressure response time | Switch toggles within 2-3 seconds of steering demand | No toggle or delayed response beyond acceptable window |
Code P1571 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, P1571 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.