kingsteve

This isn't the "Connect the pink wire together" sort of thing. For some reason the ECU is seeing a problem in this circuit. You need to track down why this is happening.

 

Here is the complete diagnostics procedure. There is not much to it. Get out your multimeter and get busy.

I am having a problem with DTC P0230 and was happy to find this post with a diagnosis procedure.

My car failed Steps 4 and 6, which test the fuel pump control unit terminals 6, 7, 8, and 9 to chasis ground. Success criteria is resistance > 1Megaohm and I was reading <0.5Megaohms. It would seem that the FPCM is the culprit.

Would the fix be as simple as just swapping it out? I checked all the wires I could and did not see any exposed wires that may be unintentionally grounding. Is there anything else I should be checking? I have tried to do my research and want to be sure before ordering the part. Help is very appreciated! Thanks

Edit: The car still runs with P0230 CEL. Other posts I've seen with similar issues describe the car won't start.

Hi everyone,

Long time lurker/learner here. I was fortunate enough to meet up with JMP in-person a couple weeks ago after hearing he lives close by to me in the midwest. As many others have said, his work is outstanding and couldn't be a nicer, more helpful guy. My dad was visiting to help with removing/installing/breaking-in the turbo and repairing some vacuum leaks I had along the way. We had to ask JMP a few times for guidance and recommendations during the process and he was quick to respond with solutions. My '05 is running better than the day I got it (rebuilt using the "Custom" option at 119k mi)! Huge thank you to JMP for making the time to complete the rebuild early so my dad and I could put the car back together correctly and take our time doing so.

BEFORE

AFTER