code P0443
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Elder User
Joined: Dec 2008
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From: Small town Iowa
code P0443
I have search and I'm confused my 96 f150 5.0 has a code p0443 (evaporative emission system purge control valve circuit). it came on at operating temps goin down the road, reset it today, drove ten miles, sat for awhile, a mild cold start and it came right back on. Reset nothing yet. Did reasearch, but all I could find was when the code could not be reset without it imideatly coming back on, and it being accompanyed by a P0713 code. What does it sound like to you guys? Sounds like a vapor canister purge valve to me. But I read somthing about a faulty pcm.
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Elder User
Joined: Dec 2008
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From: Small town Iowa
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Fleet Owner
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From: Easton,Ks
When do you get the code PO443? (KOEO, Continuous Memory or KOER)
Is resistance between 30 and 38 ohms?
Is resistance between 30 and 38 ohms?
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Fleet Owner
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From: Easton,Ks
KOEO = Key On Engine OFF
KOER = Key On Engine Running
Just unplug the solenoid and check resistance between the two pins of the solenoid.
If you have continuity the solenoid should be good (under 100 ohms).
The red wire should have battery voltage on it with the key on.
You will have no way to test the green/black wire unless you unplug the PCM and test it from pin #56 of the PCM plug.
The resistance above was for using a BOB (Break Out Box).
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KOER = Key On Engine Running
Just unplug the solenoid and check resistance between the two pins of the solenoid.
If you have continuity the solenoid should be good (under 100 ohms).
The red wire should have battery voltage on it with the key on.
You will have no way to test the green/black wire unless you unplug the PCM and test it from pin #56 of the PCM plug.
The resistance above was for using a BOB (Break Out Box).
/
Fleet Owner
Joined: Oct 2005
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From: Kentucky
The truck in question is a 1996 correct? Wouldn't it have a Vapor Management Valve?
(VMV)
versus the older style Canister Purge solenoid?
CANP
Bill, are the resistance values different between the two?
(VMV)
versus the older style Canister Purge solenoid?
CANP
Bill, are the resistance values different between the two?
Fleet Owner
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From: Easton,Ks
I would think so.
But the values I posted was from the OBD-II 1996 Ford manual for a 4.9L F-series truck pinpoint HW charts for a truck using pin#56.
But the values I posted was from the OBD-II 1996 Ford manual for a 4.9L F-series truck pinpoint HW charts for a truck using pin#56.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
I can only go by the manual as I have no personal knowledge of this system on a 1996 OBD-II 4.9L Truck.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
I have looked through several different Ford manuals for this error code a few times before. It's a little murky for sure. That is why I posted the photos of the two different style devices. Hopefully the OP can reply back with what version they have on their truck.