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Posts Tagged: P0443

Evaporative Emissions System Primer

How does an evaporative emissions system work? The Evaporative Emissions System is responsible for preventing fuel vapors from polluting our air. If you came to this post because your vehicle won’t fill with gas, skip to the bottom of the post In the old days gas tank caps were vented to the atmosphere. That allowed outside air to enter the tank as you used up the gas inside the tank. On warm days the gas expanded and gas fumes vented backwards through the vented cap to the atmosphere. In other … Read More

P0443

Fix code P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction If you have P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction, read this article. The evaporative emission control system checks to make sure there are no leaks in the lines that run from the gas tank to the charcoal canister and up to the engine. It also checks to make sure the gas cap is sealing correctly. When you fill your car with gas, the vapors in the tank get forced into a canister filled with … Read More

P0443, P1443, P1444, P1445 – Ford

Fix trouble codes P0443, P1443, P1444, P1445 – Ford For a P1433 code, check for loose, broken, kinked, or disconnected fuel vapor return hoses. Check the wiring harness issues discussed above. For a P1444 code, check the purge flow sensor connector. You may find a broken VPWR pin, or it may be damaged. Also check for a possible purge flow sensor harness signal that may be shorted to power ground. Finally, check for damaged wiring as described above. For a P1445 code, check possible purge flow sensor harness signal or … Read More


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