When the key is turned to "on" the gauge should read 0. When you start the engine, the gauge should stay at 0 for 3-5 seconds and then shoot up to 3. It will stay at 3 until the engine is totally warmed up. It'll probably take a highway cruise to get 15W-40 at about 2 bar pressure at idle.

IF the gauge shoots to 3 as soon as the key is on but the engine is not running, then yes there exists an electrical problem.