Saab 9-4X: Bad ECM → Symptoms + Diagnosis
Your Saab 9-4X’s ECM (Engine Control Module) is its brain. Just like a human’s brain, your 9-4X can’t function without it. It is sometimes referred to as the ECU or PCM. It’s all the same thing. The ECM controls and directs your entire drivetrain (unless there is a serrate transmission controller). When an ECM starts … Read more