2004 Ram 1500 Hemi - Read the thread from a year ago, seemed like he fixed his problem. We have changed all plugs & wires, coils 4 & 7 they were cracked so changed them. Checked & rechecked all. Still have code P2320. What does the Secondary curcuit ionazation mean??? One friend said its got to be in the wiring or coils. Another said it could be the computer. They are machanics & both have their own scanners. Runs great better than it ever has. But need to get it inspected or I wouldn't worry so much about it. Any ideas ??? Thanks!

 

Found something on it, guy had replaced plugs, but this time he used a different brand, problem went away. So question is, what type and brand plugs did you use?

 

Also read this: P0320 1T: Ignition Coil No. 7 Secondary Circuit Insufficient Ionization Conditions: Engine started; and the PCM detected the
Ignition Coil No. 7 secondary "burn time" was insufficient, or it was missing. Possible Causes: Cylinder No. 7 spark plug or wire
is damaged or it has failed Ignition Coil No. 7 is damaged or it has failed Ignition coil control circuit is open or shorted to ground.
PCM has failed.