P0204 Diagnostic and Misfire Issue in 2003 Dodge Grand Caravan 3.3L Engine

I recently encountered a persistent misfire and P0204 diagnostic code on my 2003 Dodge Grand Caravan Sport with the 3.3L engine. Initially, I noticed the P0304 code, which led me to inspect the injector wiring harness. I found burnt wires at the connector causing a misfire. After replacing the original Dorman injector harness with a brand-new one, the P0304 code disappeared, but a new P020-4 code appeared—alongside continued engine misfires. I replaced the spark plugs as well, but the P0204 code remains and the misfire persists. When I inserted a noid light into the #4 injector connector, there was no signal flash, indicating no power or pulse from the PCM to the injector. To troubleshoot further, I disconnected both connectors of the new injector harness from the Powertrain Control Module (PCM) and performed an ohm test between the fuel rail side of the #4 injector wire and the PCM connector. The resistance reading was within specifications, suggesting a good electrical path. Based on this, I suspect that the original faulty wiring may have caused a short or ground fault in the #4 injector circuit, potentially damaging the PCM's driver circuit for that specific injector. My current hypothesis is that the PCM has sustained internal damage to its #4 injector control circuit due to the prior electrical fault.