Refer to pages 494 & 495 of the 2004 Powertrain diagnostic manual.
P2302 ignition coil #1 secondary circuit, insufficient ionization
Set condition: if the PCM detects that the secondary ignition burn time is incorrect or not present, and error is detected.
Possible causes:
spark plug
ignition wire
ignition coil
There are 4 pinpoint tests in the flowchart to determine the fault.
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