If ECM power is important… 👉 Ground is equally important Without proper ground: ECM behaves unpredictably ❌ Sensors give wrong data ❌ Car may not start ❌ 👉 Ground issues are often: 👉 Hidden and difficult to detect 🧠 What is Ground in a Car? Ground is: 👉 The return path for electrical current 📌 … Continue reading How to Check ECM Ground (Hidden Problems Guide)