What am I missing!

Vehicle is 2010 equinox, 2.4l
Codes are p0092 and p00c9

Fuel Pressure Regulator 1 Control Circuit High and Fuel Pressure Regulator High Control Circuit Low Voltage

Have tried multiple high pressure pumps and a new pcm. It’s a 2 wire system power supplied by pcm and ground is pwm also pcm controlled. Where would you guys go next?

Thanks for any help guys!!

Have also repined ecm pin 16 and 32, new wires and connector on high pressure pump,

Didn’t have hope for this beings the codes weren’t open codes, but had to rule it out thanks can’t wait for more replys!!

The fuel pressure sensor.

Thanks for the quick response, above I attached the wiring diagram, the codes are circuit codes unless I’m looking at it wrong the low pressure side should not effect this, if anyone has any ideas I would entertain anything!

Mrwrench wrote:

Have also repined ecm pin 16 and 32, new wires and connector on high pressure pump,

New wiring from the ECM or just a new pigtail?

Are these hard codes? If not when are they setting?

Found an interesting TSB on interference from aftermarket lighting setting both codes on GM GDI applications.

Diagram did not attach... I was thinking you were posting a new diagram I really dislike those generic diagrams.
The fuel pressure sensor sends it's signal to the pcm which controls the high pressure fuel pump circuit on and off.

Two New wires from ecm and new pigtail at the high pressure fuel pump, thanks guys I really appreciate your guys opinions, I’ll try to get diagram to attach

Would also love the tsb you found

Mrwrench wrote:

Would also love the tsb you found

It's attached to the earlier post I mentioned it in. Should download, or open, a pdf when you click on it.

Thanks Matt, an interference could be the culprit, will look into that!! Any other suggestions are greatly appreciated