Modern Jeep Cherokees are rolling networks—dozens of sensors feeding modules over a high-speed CAN bus. When something glitches, it can feel like a haunted dashboard: random warnings, limp mode, or a no-start that magically fixes itself tomorrow. The trick is to approach electronics methodically. Here’s a clear, driveway-friendly playbook to find—and fix—sensor and module gremlins without replacing half the car. Start with power and grounds (the root of most “ghosts”) Electronics are only as good as their voltage. Battery health: Measure resting voltage (≥12.6V healthy), cranking voltage (stay above ~10V), and charging voltage (13.7–14.7V typical). A weak battery can cascade...