[jameschump]

Hello,

I have a 2010 f350 with a 6.4 liter motor. It recently dies after running for about 15 minutes or so. Have a scan tool and was able to retrieve the error code when this occurs.
P0090 Fuel pressure regulator control circuit

I have done as much research on this as I think I can, and just about everything I read points to the fuel rail pressure sensor or related bad wiring. I am considering replacing this sensor myself and am wondering if anyone out there has experienced this same issue and has performed the repair themselves or any advise on what to do. Thanks in advance!

 

[ford_doctor]

Hello,

I have a 2010 f350 with a 6.4 liter motor. It recently dies after running for about 15 minutes or so. Have a scan tool and was able to retrieve the error code when this occurs.
P0090 Fuel pressure regulator control circuit

I have done as much research on this as I think I can, and just about everything I read points to the fuel rail pressure sensor or related bad wiring. I am considering replacing this sensor myself and am wondering if anyone out there has experienced this same issue and has performed the repair themselves or any advise on what to do. Thanks in advance!

It is not the FRP sensor.

DTC P0090 is a fuel pressure control valve circuit fault. The PCM monitors the volume control and pressure control valve circuits and can determine if there is an open circuit condition, grounded circuit condition or a condition where the valve in question is operating but out of a calibrated range. If you have no other codes related to the fuel system then diagnosis begins with the PCV circuits then the high pressure fuel system if electrical testing passes. Historically, this code has been caused by wiring faults in the pump cover gasket or the high pressure pump itself. The pressure and volume control valves are mounted on the pump and are not serviceable.

 

[jameschump]

Thanks Ford Doctor!

I did forget to mention that I recently just had the HPFP replaced, which was up around $7,000 by the dealer. I don't know why I forgot to mention that but I'm starting to think the problem is related to that. I'm scared to death to have to take it back in and be faced with another big bill that I simply cannot afford.

Thanks
James

 

[ford_doctor]

If the pump is faulty it would have a warranty. And yes, it would have been helpful to know that the HPFP was recently replaced. Can you tell us why? Same problem and same code? Or is all of this new since the pump replacement?

 

[jameschump]

The issue I ran into before had different symptoms. I was driving with my family when all of a sudden the wrench light came on, I could only drive like 15 to 20 miles an hour. I barely made it to the dealership. Unfortunately I didn't get to run the codes myself, but from what I was told by the dealership, there was fuel leaking into the motor due to a bad HPFP. At that point I had no choice but to have them fix it and put the bill on a credit card. When I picked it up, it ran fine for about a week or so and then just randomly died. At this point I just can't bring myself to have it towed to the dealer again to only find out its another expensive problem. I feel like this is a result of something they didn't do correctly when installing the new HPFP but is difficult to figure out on my own. Thanks for your replies in advance.

 

[ford_doctor]

Well, in my opinion, this current concern is new from what you are telling me. Given the code you have and the fact that the HPFP is new I strongly suspect that the pump is defective or there is an issue with the pump harness underneath the pump cover. I doubt that a new pump cover gasket (which contains the wire harness) has chafed this quickly but we have seen fitment issues with the harness connectors not seating and locking onto the pressure and volume regulator valves causing intermittent contact. There is also an outside chance there is a problem with the the engine harness or the jumper harness that connects to the pump.

I WOULD RETURN TO THE DEALER WHERE THE WORK WAS PERFORMED. If either of the suspect faults is found it should not cost you a dime.

 

[jameschump]

Well, in my opinion, this current concern is new from what you are telling me. Given the code you have and the fact that the HPFP is new I strongly suspect that the pump is defective or there is an issue with the pump harness underneath the pump cover. I doubt that a new pump cover gasket (which contains the wire harness) has chafed this quickly but we have seen fitment issues with the harness connectors not seating and locking onto the pressure and volume regulator valves causing intermittent contact. There is also an outside chance there is a problem with the the engine harness or the jumper harness that connects to the pump.

I WOULD RETURN TO THE DEALER WHERE THE WORK WAS PERFORMED. If either of the suspect faults is found it should not cost you a dime.

I want to thank you so very much for your professional advise on this issue. I did just as you advised and had my truck towed back to the dealership where I had the HPFP replaced by the dealer, and sure enough, it was a bad replacement HPFP. Everything was covered under the warranty of the faulty replacement part and have a working truck again. Thanks again!

 

[ford_doctor]

I want to thank you so very much for your professional advise on this issue. I did just as you advised and had my truck towed back to the dealership where I had the HPFP replaced by the dealer, and sure enough, it was a bad replacement HPFP. Everything was covered under the warranty of the faulty replacement part and have a working truck again. Thanks again!

My pleasure - I am glad to hear that you got the truck repaired and that it was warrantable. You seemed upset about having to pay to fix your truck again which is understandable. Bad parts happen. .