Good afternoon all,

I posted this question in the van section but was advised i might get more help here. I have a 2006 E350 van with the V10. As i was driving home the other day, I got a CEL but didn't notice any change in performance. After getting home, I used my OBD adapter and got the code P0193 (Fuel Rail Pressure Sensor Circuit High Input) Is anyone familiar with this code and have experience or suggestions for it's diagnosis/repair? This is my family travel van so I will most likely take it to the shop but I'd rather not go in completely blind and at their mercy. Thanks in advance for your help.

 

Sounds like a wiring fault - corrosion in the connector, that sort of thing.

If you clear DTCs, does it come back right away? Reason I ask is, sometimes a bad alternator or low battery can cause weird symptoms.

 

P0193

Could be any of the following:

Faulty FRP.
Open or intermittent circuit in the FRP wiring back to the PCM.
Shorted FRP signal line to power

Start with inspecting the connector on the FRP.

 

I cleared the codes and ran it for a little while and it didn't come back. I'll drive it a bit on friday and see what happens. I did notice this reading on the torque app though. Is that number high for fuel rail pressure? Not sure how accurate it is or if it is in fact related to the code i had.

Thanks

 

From what I just read, the fuel pressure sensor increases resistance as pressure increases. So any resistance at the connector or wiring will cause the PCM to see a higher pressure. And yeah, 60+ psi seems a bit high. I've only worked on the older model Fords that didn't have that sensor, and they ran at 28-30 at idle, and 38-40 under load.

Check the connector at the sensor first.

 

65 psi is correct for the 6.8L 2V engine used in the E-series.

 

So i cleared the codes and drove it a good bit on friday to include towing my daughter's car. So far the light hasn't come back on