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Posts Tagged: P0442

P0442 Ford

Fix a P0442 leak and P0442 code comes back If your Ford shows a P0442 Evaporative Emission Control System Leak Detected (small leak), you should know that Ford has had some problems with the capless flap in the gas tank filler neck. If installing a new one doesn’t fix the P0442 problem, continue to test the vent and purge solenoid valves, as well as the fuel tank pressure sensor (FTP). The FTP should show 2.6-volts while the EVAP system is open and then drop to 1.0-volt or less when the … Read More

Cranks but won’t start – GM products

Cranks but won’t start Cranks but no start, P0442, P0449, P0455, P0463, C0045, C0050, Service Engine Soon light on, ABS light on, fuel gauge erratic, fuel gauge doesn’t work. Chevrolet Malibu, Pontiac G6, TSB PIC4661 GM has issued a technical service bulletin (TSB) PIC4661 to address Cranks but no start, no start, P0442, P0449, P0455, P0463, C0045, C0050 conditions. The TSB applies to the following vehicles: 2004-2007 Chevrolet Malibu 2005-2007 Pontiac G6 These vehicles were manufactured with a wiring harness that is exposed to road debris causing it to be damaged. … Read More

P0442 P0455 P0456 Chrysler

Fix code P0442 P0455 P0456 Chrysler These evaporative emissions codes can be caused by cracks in evaporative hoses, charcoal canister vent and purge valve or the leak detection pump. © 2012 Rick Muscoplat Save

Fix codes P0442, P0456 on Ford

Fix codes P0442 P0456 Ford P0456 Evaporative Emissions System – Small leak detected P0442 Evaporative Emission Control System Leak Detected (small leak) These codes indicate that the Evaporative Emissions System has failed a leak test. To perform the test the computer energizes the vacuum management valve (VMV) vent valve. That opens the fuel system to fresh air. Then it opens the VMV purge valve. That opens the system to engine vacuum. The engine sucks fresh air into the charcoal canister to purge all the gas vapors collected inside. The computer … Read More

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

p0442 nissan titan

At first glance this appears to be like any other P0442 Evaporative Emission Control System Leak Detected evaporative emissions leak. But if you’re getting this code and really poor engine performance, or the engine goes into “limp-in mode” you may have a broken or shorted wire. Read More

P0442 P0455 P0456 Ford

Fix code P0442 P0455 P0456 Enhanced Evaporative Emissions on Ford Vehicles Understanding how this system works helps you to diagnose those dreaded EVAP leak codes. So buckle up and I’ll try to make this as painless as possible. System Components The system uses two solenoids and a pressure sensor. One sensor is called the Vapor Management Valve (VMV). The other is called the Canister Vent Solenoid (CV). The sensor is referred to as the Fuel Tank Pressure Sensor (FTP). The VMV is normally in the CLOSED position. It has 3 … Read More

P0442

Fix code P0442 Evaporative Emission Control System Leak (Small leak) If you have a P0442 Evaporative Emission Control System Leak (Small leak), read this. The Evaporative Emissions system has applied a vacuum to the fuel system and detected a small leak. A P0442 small leak is usually caused by a crack in the vacuum hose somewhere in the system. It can also be caused by dirt or spider webs blocking the complete sealing of the purge or vent solenoids. GM has reported some issues with spiders building nests in the … Read More

P0442 code Chrysler Vehicles

Fix P0442 code Chrysler Vehicles Many shops are reporting problems with P0442 code Chrysler Vehicles. The computer puts the system into a leak detection mode and pulls a vacuum on the gas tank, venting hoses, and charcoal canister. Then it watches a vacuum sensor to figure out whether the leak is a large or small one. The most common P0442 code is found right in the rubber hoses right at the charcoal canister. To diagnose a P0442 code, lower the canister and check the condition of the rubber hoses. If you … Read More

P0440, P0441, P0442, P0446 EVAP codes on GM vehicles

P0440, P0441, P0442, P0446 EVAP codes on GM vehicles Shops report problems with P0440, P0441, P0442, P0446 EVAP codes on GM vehicles. In order to troubleshoot any of the GM EVAP codes, it’s important to understand how the system works. The evaporative emissions system is designed to prevent raw gas vapors from entering the atmosphere. That means the entire fuel supply system must be sealed and tested on a regular basis. Gas vapors are absorbed by a canister of activated charcoal. When certain driving conditions are met, the engine sucks … Read More


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