2002 Toyota Camry SE 2.4L Misfire Code P0302
Vehicle problem question:
What could cause a constant P0302 misfire code after finding an open wire connection on cylinder # 2 ignition coil? This # 2 coil wire was repaired and was tested with good continuity. When the engine fired up, the miss is still there and showing the same code. I tried swapping ignition coil from another cylinder but the miss is still there?
Shown above is the wiring diagram of ignition coil circuit. Although you fixed the IGT wire in coil # 2, this might have affected the driver of the ECM. To test, use a noid light tester and compare each coil wire outputs. The noid light tester should blink at the same rate. If # 2 is different, the ECM is damaged.
Replaced ECM and engine miss is gone!
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