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On a 2006 F150 5.4L - How do you check or validate an open…

On a 2006 F150...

On a 2006 F150 5.4L - How do you check or validate an open loop (Bank 1 or both) Fuel System A status

Mechanic's Assistant: Are you certain it's the fuel pressure sensor that's in need of attention? What about the fuel rail? Have you checked it yet?

I have a check engine light on -- P0345 code -- I have already changed those out and reset the CMP...Light stays off. Drive 10 miles...light still off. park and shut off the truck. Restart the truck and the check engine light is back on -- throw the reader back on and it gives the same P0345 code

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

The gas cap seal is fine. I replaced the two Camshaft Position sensor curcuits

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

When I did the "Freeze Frame" on the Fuel System A Status -- comment "open loop (Bank 1 or both)"

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Answered in 2 minutes by:
3/10/2018
roy
roy, import/domestic specialest
Category: Ford
Satisfied Customers: 7,265
Experience: ASE master tech for 40 years
Verified

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

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Customer reply replied 1 month ago
okay

ok, this code is an electrical issue, not a component issue.

do you have a scan tool that can read the voltages at the cam sensor?? you need to be sure you have reference voltage, ground and signal voltage at the connector.

Roy

P0345

ItemDescription

Symptom/DTCP0345

Descriptor

Probable Causes

  • Camshaft Position (CMP) Circuit Open
  • Camshaft Position (CMP) Circuit Shorted to Ground
  • Camshaft Position (CMP) Circuit Shorted to Power
  • Camshaft Position (CMP) Sensor Damaged
  • Camshaft Position (CMP) Sensor Shielding Damaged
  • Powertrain Control Module (PCM) Damaged
  • Signal Return Circuit Open
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Customer reply replied 1 month ago
I can go reconnect the OBD-II tool and see if it reads the voltages at the cam sensor

if it is a code reader, most likely it will not but check it anyway

Roy

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Customer reply replied 1 month ago
do you want me to go do that
Customer reply replied 1 month ago
I will be back in a few minutes...

sure give it a try

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Customer reply replied 1 month ago
When I did the Freeze Frame on the Reader -- it does not provide any information to voltages at the cam sensor

do you have a volt meter to verify these voltages??

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Customer reply replied 1 month ago
Sorry to keep you waiting -- I had to locate my OHM meter -- got it
Customer reply replied 1 month ago
What do I do 1st?
Customer reply replied 1 month ago
Roy -- are you there?
Customer reply replied 1 month ago
Helloooo -- says you are on line

hello I am here sorry, getting dinner for kids

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remove the connector from the cam sensor and check for voltage, not ohms on the connector.

Roy

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Customer reply replied 1 month ago
That I need someone to crank the engine why I'm testing that
Customer reply replied 1 month ago
How do I check for the voltage

no, key on, engine off. only you are needed

You need to set your voltmeter to dc volts. put the black lead on a good ground and the red lead into 1 pin at a time. tell me the voltage on each pin

Roy

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Customer reply replied 1 month ago
From the wiring harness correct not the sensor
Customer reply replied 1 month ago
This is a 2-wire I'm getting nothing on both sides of the connectors

correct, on the harness

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Customer reply replied 1 month ago
0 Nothing then on both sensors

checking

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diagram attached

you will need to go to the pcm pins 44 and 46 listed in the diagram and do ohm check from there to both sensors. 44 goes to one sensor and 46 to the other.

looking for open circuit as the sensors need voltage to operate.

Roy

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Customer reply replied 1 month ago
In the schematic I don't see it 46 Penn I do see a 45 and I don't see in the schematic you sent the actual numbers on the PCM computer box

sorry, 44 and 45 senior moment

yes they are marked. match the color of the wires

Roy

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Customer reply replied 1 month ago
Do I check the wire from this?

set your meter to the ohm scale

put one lead at the sensor wire and the other lead to the wire at the connector at the pcm. tell me the reading. you are checking the continuity of the wire to see if it is broken

Roy

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let me get a pin out diagram

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yes it could

that would not explain no voltage

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Customer reply replied 1 month ago
Okay Roy sounds going down is getting cold tomorrow is another day thanks for all your help

your welcome

Please take a moment and rate my service 3 stars or better. that is the only way the site will pay me for my efforts.

Roy

roy
roy, import/domestic specialest
Category: Ford
Satisfied Customers: 7,265
Experience: ASE master tech for 40 years
Verified
roy and 87 other Ford Specialists are ready to help you
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Customer reply replied 1 month ago
Will do...thanks again

thank you

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roy
roy
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Category: Ford
Satisfied Customers: 7,265
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