![]() ![]() Ford Canister Purge Valve Replacement EVAP.Failure to do this could result in a misdiagnosis and the almost-certain unnecessary replacement of parts and components.Īlso, remember that bubbling fuel from the fuel delivery nozzle can create back-flow, fill a vent pipe and trigger codes. Refer to the manual for detailed information on any additional codes that may be present, but be sure to follow the directions in the manual exactly if the manual calls for other codes to be resolved first, before a diagnosis of P1450 is attempted. In some cases, there may be other EVAP system related codes present as well, some of which may be the result of code P1450, while others may have contributed to the setting of code P1450. In researching this, several sources indicate that you should replace your gas cap between 50,000 - 75,000 miles Final Notes He read somewhere that fuel caps are a maintenance replacement item 100,000 miles. Fierce pressure exited his fuel tank, so he got the idea to replace the gas cap. In the second case, his gas tank was overfilled and wouldn't clear. He had to remove a fender liner to get to it. He blew hard into the intake using a 2-foot piece of garden hose and was able to locate a hiss. It was directly behind the fuel filler door and had a downward pointing barb fitting. ![]() In the first case, he discovered that an air intake check valve lived high in the vapor handling hoses. A week later, he reported that he was not experiencing any check engine lights or driving issues.Īnother member reported that this code occurred twice, on two identical cars. He then erased the code by disconnecting the battery. His gas tank was full so that could have contributed to the problem. He noticed that when he tried to blow through "Y" configured lines, there was some restriction that required more force. Finally, he blew air through the gas tank vent tube with no restrictions. Then, he blew air through the canisters with no restrictions. There was some dirt up there so he blew air through the CV vent solenoid and there were no restrictions. He removed the canister rack and reseated CV vent solenoid connection. The Ford-Trucks forum members have some good advice as well. You will find many different opinions on how to diagnose and repair this issue. Damaged charcoal canister from overfilling the gas tank.The engine may be difficult to start directly after filling the tank.Damaged, burnt, shorted, or corroded wiring and/or connectors.Damage to the charcoal canister caused by overfilling of the fuel tank.Fuel filler cap stuck closed, preventing vacuum relief.Kinked or collapsed hose between the canister and fuel tank.Blockage in the vacuum line between the vent valve inlet and the fuel tank EVAP canister or vent solenoid.This “bleeding” refers to the PCM’s inability to maintain a specified vacuum in the EVAP system only when the engine is running at speeds above idling RPM’s. System Failure occurs when the Evaporative Emission (EVAP) running loss monitor detects excessive fuel tank vacuum with the engine running, but not at idle. P1450 Explained The Powertrain Control Module (PCM) monitors the fuel vapor vacuum and pressure in the fuel tank. Error Code P1450 appears when the PCM is running system monitor and detects excessive vacuum in the fuel tank or EVAP system. The PCM (powertrain control module, also known as ECM or engine control module) monitors the fuel tank's fuel vapor and pressure. An app can be purchased for $4.95, and an OBD-II Scanner/Code Reader can be purchased for anywhere between $19 and $300+ depending on what service functions you need. Scanner programs and tools vary in price. If you are not comfortable diagnosing and repairing your car, please take it to a Ford service center. From there, you can look up the Diagnostic Trouble Codes right here t o learn what's going on and try to repair it yourself. Simply connect the scanning tool (or a computer with scanning software downloaded) to the connector (located under the steering wheel) and the readout will show you Diagnostic Trouble Codes that might be affecting your car. This article applies to the Ford F-150 and F-250 Super Duty.Įvery Ford truck comes equipped with an OBD connector which can be used to send messages to an OBD2 troubleshooting reader like the one below.
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