My red line has thrown P0231 twice in the past couple of days... "Secondary Fuel Pump Circuit Low"...

has anyone seen this on their car or know what causes it??

Thanks!
Nate

 

G402 (Coupe) (CKT 850) Under the rear shelf near the speaker LR
G402 (Sedan) (CKT 850) Center of the rear shelf near the speaker RR
These are the locations for the ground,you can check these quit easily first.
2)Check the connection on the fuel pump.(corrosion here would be my guess)
3)Check fuse and relay are seated properly ,pull out and put back.(located under hood fuse box)
4)Check connectors at fuse box for tightnes and seating.
5)Connector C305 (16 cavities) has the feed and ground for the fuel pump pass through it,located under the right rear seat back on the floor.

 

I had this pop up again recently, can't seem to find a cause to it. Car runs fine. Anyone else see this?