 Voltmeter. Scan tool. Okay. And if you take the gas cap off, does it change? No. Okay. If you apply vacuum, you've got the sensor out of the tank, so you've got it in your hand? I have it out of the canister now, yes. And so I can apply pressure or vacuum to it, and it does respond. Okay. So we've got to say, then, that the sensor's working correctly, right?