Cadillac DeVille engine shuts down while driving with all dashboard lights on and no response even after key removal on Cadillac DeVille

Some Cadillac DeVille owners report experiencing engine shutdowns while driving, accompanied by all dashboard lights illuminating and no response even after key removal. These issues may be linked to a defective ignition switch or a faulty crankshaft position sensor. Additionally, if dashboard lights and accessories fail to activate when the key is turned, it could indicate problems such as a loose battery connection, corroded battery post, or a bad battery cable. While some may experience normal engine shutdown behavior due to automatic features at stop lights, if this is not the case, further investigation is warranted. To accurately diagnose the issue, a live data scan using an engine analyzer connected to the OBD port is recommended to assess the vehicle's spark and fuel trim. It is advisable for owners to seek inspection from a qualified mechanic to determine the precise cause of these engine shutdown concerns.