Gear Shift Position Circuit [senses forward / rearward position, odd / even gears]
Your transmission's gear position sensor isn't telling the engine which gear you're in (forward, reverse, odd gears, or even gears). It's like a broken speedometer that can't report your current speed to the dashboard.
The ECM monitors voltage signals from the gear shift position sensor to determine transmission state (forward/reverse and odd/even gears). The sensor produces specific voltage levels for each gear position, and the ECM compares these against programmed thresholds to validate proper transmission operation.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor voltage signal | 0.5–4.5V depending on gear position | Out-of-range voltage, no signal, or inconsistent state detection |
| Signal stability | Steady voltage in current gear | Fluctuating or missing signal from shift position sensor |
Code P0914 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, P0914 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.