Pedal Correlation PDS2 and LPDS High
Your gas pedal sensors are sending conflicting signals to the engine computer, like two people disagreeing on how hard you're pressing the accelerator. The ECU detects that both pedal position sensors are reading abnormally high at the same time, which shouldn't happen.
The ECU monitors two independent pedal position sensors (PDS2 and LPDS) for redundancy and cross-checks their signals. When both sensors read above their expected thresholds simultaneously, the ECU flags a correlation fault because the signals should track together within a normal range. This indicates either sensor malfunction or a wiring issue affecting both circuits.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| PDS2 Voltage | 0.5-4.5V | Both sensors >4.5V or mismatched correlation |
| LPDS Voltage | 0.5-4.5V | Both sensors >4.5V or mismatched correlation |
Code P1259 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, P1259 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.