Engine Shutoff Solenoid Malfunction
The engine shutoff solenoid, which controls fuel delivery during engine shutdown, isn't working properly. Think of it like a water valve that's stuck and won't close when you turn off the ignition.
The ECM monitors the engine shutoff solenoid's electrical resistance and response time when the ignition is cycled. It checks for proper voltage drop across the solenoid coil and verifies the solenoid actuates within expected timing windows during shutdown events.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Coil Resistance | 4-12 ohms | Open circuit (infinite) or short (< 1 ohm) |
| Solenoid Response Time | 50-200 milliseconds | No response or delayed > 500 ms |
Code P0216 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, P0216 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.