2010 Wrangler Sport 3.8 had a misfire on cylinder 6. Replaced coil, wires, and plugs and still had misfire. Figured I’d check the injector because I needed to do intake gaskets anyway. Found 4 of the 6 injector plugs corroded with cylinder 6 being the worst with a broken pin from the corrosion. Replaced all 6 injectors and their pigtails. Got it all back together and still has a miss on cylinder 6. Checked the codes and it has a P0206 injector 6 circuit open. Checked resistance and voltage drop of the circuit it was all good. Ohmed the new injector and it is in spec as well. Could the corroded injector have caused enough resistance to burn out the injector driver in the ECM?
2010 3.8 P0206
- Thread starter dbsnyder97
- Start date
Given the circumstances, it is possible that the corroded injector and the broken pin could have caused enough resistance to damage the injector driver in the PCM. Corrosion and bad connections can lead to incorrect signals being sent, which might overheat or stress the driver circuit over time.
Here are a few steps to further diagnose the issue:
Inspect the PCM: Check for any visible signs of damage or corrosion. If you have a multimeter, you can also test the output of the injector driver directly from the PCM to see if it is providing the correct voltage to the injector.
Wiring Inspection: Double-check the wiring harness for any other potential issues. Look for frayed wires, poor ground connections, or any other signs of damage further down the line.
Swap Injectors: If possible, try swapping the injector from cylinder 6 with one from a different cylinder (like cylinder 5 or 4) to see if the code changes to the new cylinder. If it does, then the issue could indeed be with the ECM.
PCM Reprogram or Replacement: If you've confirmed the wiring and injector are good, and you're still getting the P0206 code, it may be time to consider the possibility of needing to reprogram or even replace the ECM. @Wranglerfix can hook you up with a new PCM (https://wranglerfix.com)
Hopefully, one of these steps will help you pinpoint the issue. Good luck!