Gear Shift Position Circuit High
The transmission's gear position sensor is sending a signal that's too high to the engine computer, like a volume knob stuck at maximum. This prevents the ECU from accurately detecting which gear the transmission is in.
The ECU monitors the analog voltage signal from the gear shift position sensor, which should vary between discrete voltage levels for each gear position (Park, Reverse, Neutral, Drive, etc.). When the voltage exceeds the maximum threshold for any valid gear position, the ECU registers a 'Circuit High' fault and cannot determine actual transmission position.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Gear Position Sensor Voltage | 0.5V to 4.5V (varies by position) | >4.8V or open circuit |
| Signal Integrity | Stable within ±0.2V | Erratic or continuous high state |
Code P0917 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, P0917 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.