mc03

Thanks for these suggestions, however the issue is that the car won't even start. I will run the KOEO tests though when it happens next. I don't think its the relay. I have tested and swapped multiple relays and know they are ok. When the issue occurs, the relay is not getting the ground signal from the PCM to open. I have confirmed this with a multimeter. Its either the PCM itself, or some other fault that is causing a fuel pump lockout in the PCM.

I'm dealing with an issue on my 2003 BA turbo manual where the fuel pump relay is not getting a trigger signal from the PCM. The car is tuned with an SCT flash tuner, but this was done years ago, this issue is only recent. The fuel pump does not get a signal from the PCM to prime or run. Sometimes disconnecting the battery and letting the PCM reset will fix it, sometimes it won't, but eventually it stops working and won't work again until reset. The fuel pump and all its wiring after the fuse box is fine, the car runs without issue if I bridge out the fuel pump relay with a jumper wire. I have swapped and tested multiple relays and changed the inertia switch, didn't fix it. The wires between the PCM and the fuel pump relay are fine (<1ohm), and all the PCM pins and connectors look fine, so I'm convinced the PCM isn't opening the ground signal to open the fuel pump relay (it does have 12v on the coil side). When it happens it throws code P0230 fuel pump relay primary circuit malfinction. Has anyone encountered this before and has any idea where to look next? Is my PCM dead? Any advice is appreciated, thanks