Gate Select Position Circuit Intermittent
Your engine's variable valve timing selector is sending an inconsistent electrical signal to the computer, like a light switch that flickers on and off. The ECU can't reliably detect which position the valve timing gate is in.
The ECM monitors the gate select solenoid circuit voltage to determine camshaft position timing. It expects a stable signal within normal operating range; intermittent dropout or signal noise triggers the fault. The circuit must maintain consistent continuity and proper voltage levels.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Gate Select Solenoid Voltage | 12V steady when commanded on; 0V when off | Erratic transitions, intermittent dropout, or floating voltage |
| Circuit Resistance | Less than 10 ohms at connector | Greater than 15 ohms or infinite resistance detected |
Code P0908 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, P0908 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.