Question about 1997 Ford F150 Regular Cab

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I have 1997 F150,check engine light came on, took to mechanic, code P0443(evap system code)came up. Replaced evap purge solenoid, smoke injection test for leaks, everything seemed to be working correctly. I recieved truck, drove for about 60 miles, check engine light came on again, same code(P0443). Checked system for leaks again(still no leaks), brand new evap purge solenoid functioning correctly. Received truck drove for about 30 miles, check engine light came on again with same code(P0443), what else,or where else could be the problem causing the same code to come up?

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  • Anonymous Mar 22, 2014

    what is check engine code p0443

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Anonymous

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Maybe a fuse is blown? did you have the mechanic check the fuses? or even check all your relays and wiring?

Posted on Dec 10, 2009

  • jayride223 Mar 12, 2011

    thanks you were spot on the fuse was blown and the wire was a little corroded checked changed and it was all plug and play from there. tested truck and it is running great

  • Adam Heiden Dec 17, 2018

    what fuse ?

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Might want to check the solenoid connector for a corroded wire or pins. Follow the wires back towards the PCM ( pain, but can be done ).
Usually the blown fuse ( engine compartment fuse #23 ) has 4 or 5 codes total with the P0443.

The full list from the Ford Service manual
Diagnostic Trouble Code (DTC) P0443 indicates a failure in the EVAP canister purge valve circuit.

Possible causes:

-- VPWR circuit open.
-- EVAP canister purge valve circuit open.
-- EVAP canister purge valve circuit shorted to PWR GND.
-- EVAP canister purge valve circuit shorted to VPWR.
-- Damaged EVAP canister purge valve ( should not be this, it is new )
-- Damaged PCM.

Posted on Dec 11, 2009

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My engine light was on. Received code P0455. I changed the purge solenoid on my 2008 Cadillac Escalade exactly 1 week ago. The engine light went off and now it's on again exactly 1 week later. I received...


The check engine light went off on it's own ? Before replacing the purge solenoid did you test the evap system by smoke checking ? Would have other code's besides P0455 if purge solenoid was bad. DTC P0455: Evaporative Emission (EVAP) System Large Leak Detected
• Inspect for a loose, missing, damaged, or incorrect fuel fill cap.
• Inspect for a damaged fuel filler neck seal surface.
• A blockage or restriction in the EVAP purge solenoid valve, purge pipe, EVAP canister, or vapor pipe, can cause this DTC to set.
• The EVAP system can be filled with smoke more quickly and completely by opening the system opposite the end where the smoke is injected. For example, when injecting smoke at the service port remove the fuel fill cap, or temporarily leave the vent open, until smoke is observed, then close the system and continue testing. If using a fuel cap adapter at the filler neck, use the J 41413-VLV at the service port to allow the system to fill faster.
• To help locate intermittent leaks using the J 41413-200 , move all EVAP components while observing smoke with the J 41413-SPT .
• Individual components can be isolated and tested using adapters in the J 41413-300 .
• A condition may exist where a leak in the EVAP system only exists under a vacuum condition. This type of leak may be detected by using the scan tool Purge/Seal function to create a vacuum in the EVAP system and then observe the FTP parameter for vacuum decay.

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I would like to know about code Po443 on my 2003 ford escape 3.OL I purchusad a new EGR Valve and A new solinide did i order the wrong parts?


P0443 FORD - EVAP Purge Control Circuit Possible causes Faulty Evaporative Emission (EVAP) Purge Solenoid Control Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection What does this mean? When is the code detected? - An improper voltage signal is sent to ECM through the valve. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) P0443 Ford Description The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.
Hope this helps

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I have a 2003 ford escape 3.L and a code came up as po443 my unerstanding it is my egr valve and the solinide is this correct or did i purchas the propper parts for this code


P0443 FORD - EVAP Purge Control Circuit Possible causes Faulty Evaporative Emission (EVAP) Purge Solenoid Control Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection What does this mean? When is the code detected? - An improper voltage signal is sent to ECM through the valve. Possible symptoms Engine Light ON (or Service Engine Soon Warning Light) P0443 Ford Description The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

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1 Answer

What code is po443


ossible causes
- Faulty Evaporative Emission (EVAP) Purge Solenoid Control
- Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
- Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection
help.jpg What does this mean?
When is the code detected?
An improper voltage signal is sent to Engine Control Module (ECM) through the valve.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0443 Description
The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the Engine Control Module (ECM). The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

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