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P0231-seeing this alot at HELP!

4K views 1 reply 2 participants last post by  Dodgemason 
#1 ·
P0231-Fuel Pump Secondary Circuit Low is what has been coming up in the DTC.

Truck wouldnt start a few weeks ago after an hour drive, check codes and P0231 came up. after reading up i replaced the fuse under the hood and no problem until last night. same code again except this time it took longer before it cranked up. Cleared codes last night drove to work this morning and it seems like everything is good.

I hammered down on it pretty good yesterday, does this have anything to do with. whats going on? Why does this keep coming up?
 
#2 ·
Mine did the same thing. I replaced the cam sensor and the crankshaft sensor. Finally found that there is a "non-serviceable" relay on the fuse block under the steering wheel in the cabin that I belive keeps the fuel pump running. The wiring going to the relay was fried, I spliced in a new external relay in that circuit and now its not shutting off anymore.
 
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