Buick Rendezvous engine shutdown issue with no error codes after replacing multiple components on Buick Rendezvous

Some Buick Rendezvous owners report experiencing frustrating engine shutdown issues despite replacing multiple components without any error codes appearing. These problems may stem from a faulty electrical system, where issues with the battery, alternator, or wiring connections could lead to intermittent power loss. Additionally, some owners find that their fuel system may have problems like a clogged fuel filter or a failing fuel pump, which can result in stalling without triggering error codes. Others have reported that faulty ignition components, such as ignition coils or spark plugs, can cause unexpected engine shutdowns. Furthermore, issues with sensors like the crankshaft or camshaft position sensors may lead to similar shutdowns without error notifications. In some cases, a malfunctioning Powertrain Control Module (PCM) or Engine Control Unit (ECU) may be the culprit, necessitating a diagnostic scan to uncover hidden issues. Vacuum leaks can also disrupt the air-fuel mixture, contributing to engine shutdowns. If these issues persist, it is advisable for owners to seek help from a qualified mechanic or dealership experienced in diagnosing complex engine problems to effectively identify and resolve the root cause.