What is code PO355 on a 2004 Ford Escape?

The code P0355 on a 2004 Ford Escape refers to a problem with the ignition coil "E," specifically indicating a malfunction in the coil's primary or secondary circuit. This can lead to misfires, poor engine performance, and increased emissions. Possible causes include a faulty ignition coil, damaged wiring, or a malfunctioning powertrain control module (PCM). Diagnosing the issue typically involves inspecting the ignition coil and associated wiring for damage or wear.