Will a bad PVC valve cause oil pressure drop?

Yes, a faulty PVC (Positive Crankcase Ventilation) valve can lead to a drop in oil pressure. When the PVC valve malfunctions, it can cause excessive blow-by gases to enter the crankcase, leading to increased pressure and potential oil leaks. This disruption can ultimately affect the oil circulation and pressure in the engine, resulting in lower oil pressure readings. Regular maintenance of the PVC system is essential to prevent these issues.