Several codes

I am building a 1953 project truck using a 2008 ford sport trac 4x4 with the 4.6l v8 (chassis, drivetrain, wiring, etc.). Everything was disconnected at one point and has been reassembled. I am now getting several codes that were not there before the disassembly. The truck cranks and seems to run fine. Can't drive it on the road yet. The codes I am getting are the following. P0642, P0113, P0191, P0345, P0349. I have double checked my grounds and the engine has all new coils. Any help would be much appreciated.
Tom

Are all of those hard codes? If you clear them, which ones come back right away?

If P0642 is a hard fault, I'd pursue that one first. The code definition suggests a partial or complete short to ground on one of the 5V reference circuits. Check for 5V at several sensors underhood KOEO.

Did you also transfer the returnless fuel system from the Sport Trac to the project truck? P0191 suggests a (measured) fuel pressure problem. NOT a circuit fault related to the P0642 above.

P0113 is fpr high voltage on the IAT sensor. No offense, but did you plug it in?

P0345 and P0349 can be tricky. They can set from a CMP sensor circuit problem OR a physical timing issue. Was the engine ever opened up during the project?

If it helps, here's the OBD Theory and Operation PDF for the 2008 MY from MotorcraftService.com:

www.fordservicecontent.com/ford_content/...orcraft/OBDSM804.pdf

Thanks for the response.

The P0113 ended up being due to an aftermarket CAI with a modified bracket to hold the sensor. May have been leaking by. I put the original air breather system back in and the code went away.

For the P0345 and P0349, yes the engine was opened up and timing chains replaced. Timing could be off. I have decided to change the cam phasers so I will check the timing when that is done.

The complete fuel system was transferred over to the project truck and far as I can tell everything is connected. Not sure what to test for the P0191 code.

The P0642 is the one that I need the most help with. I have a digital multi-meter but I don't know a whole lot about automotive electrical sensors. For example if I wanted to check for 5v at the fuel pressure sensor, how would I do that? Also, what other sensors under the hood would I test for 5V?

Thanks,
Tom

Hi,
to check the 5v feed to the frp senor first unplug it with the switch open and then look with your dvom for the 5v. Depending on the circuit design on a three wire sensor there maybe two wires with ~ 5v on it, the one with a slightly higher reading will be the reference voltage.

Do you count with a diagram of the donor's car original installation?

I think there are chances the P0642 and the P0192 are related after reading the descriptions.

Thanks for the reply. I don't understand your question. "Do you count with a diagram of the donor's car original installation?

TG53 wrote: Thanks for the reply. I don't understand your question. "Do you count with a diagram of the donor's car original installation?

Do you have (access to) the wiring diagram of the car where you pulled the harnesses, computer, sensors etc from?

I do not. I have looked around the internet for a 2008 Ford Sport Trac with a 4.6l v8 3 valve engine but have not been able to find anything. Do you have any suggestions on where I can find it?

If you have a 5v short to ground this will help

TG53 wrote: I do not. I have looked around the internet for a 2008 Ford Sport Trac with a 4.6l v8 3 valve engine but have not been able to find anything. Do you have any suggestions on where I can find it?

Mitchell DIY is always an excellent option. $20 gets you a month of online access to Mitchell service information, which is my professional preference.

www.eautorepair.net/marketing/html/products.asp?VID=&Count=Y

There's also Haynes manuals available for stupid cheap. :lol: $15 gets you a year of access online:

haynes.com/en-us/ford/explorer/2002-2010

I don't love the Haynes format? But that's a tough price to beat. I went this route for a couple cars in my personal fleet just so I could keep the manual in front of me on my phone while doing repairs.

TG53 wrote: I do not. I have looked around the internet for a 2008 Ford Sport Trac with a 4.6l v8 3 valve engine but have not been able to find anything. Do you have any suggestions on where I can find it?

The Carmin Lite android app has '08 Explorer, including Sport Trac, wiring diagrams. And if you don't have an android device it will run on a windows pc with an android emulator.