Ford Code P0442 is an EVAP System Leak Detected (Small Leak) diagnostic trouble code that can indicate a potential problem with a Ford vehicle’s emissions control system. This code is triggered when a fuel vapor leak from an opening as small as the EVAP running loss monitor test detects 1.016 mm (0.040 in). Common causes of this code include aftermarket EVAP hardware that does not comply with the required specifications, small holes or cuts in fuel vapor hoses or tubes, an EVAP canister vent valve that remains partially open on closed command, a damaged, missing, or loosely installed fuel filler cap (if equipped), a capless fuel tank filler pipe that is damaged or not properly sealed (if equipped), loose fuel vapor hose or tube connections to the EVAP system components, or EVAP system component seals leaking at or near the EVAP purge valve, fuel tank pressure (FTP) sensor, EVAP canister vent valve, fuel vapor control valve tube assembly, or fuel vapor vent valve assembly.
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Causes and Solutions for Ford Code P0442
| Causes | Solutions |
|---|---|
| Aftermarket EVAP hardware not meeting specs | Ensure all EVAP components meet Ford’s specifications |
| Holes or cuts in fuel vapor hoses/tubes | Replace any damaged hoses/tubes |
| EVAP canister vent valve not closing | Check the EVAP canister vent valve for proper operation |
| Damaged/missing/loose fuel filler cap | Replace or tighten the fuel filler cap |
| Capless fuel tank filler pipe not sealed | Install supplemental fueling adapter five times to clear debris on the seal |
| Loose fuel vapor hose/tube connections | Tighten all loose connections |
| EVAP system component seals leaking | Examine and replace any leaking seals |
Ford Code P0442 is an issue that can affect the emissions control system of a Ford vehicle. This code is triggered when the EVAP running loss monitor test detects a fuel vapor leak from a small opening. Suppose a Ford vehicle is displaying this code. In that case, it may be due to several causes, including aftermarket EVAP hardware not meeting specifications, holes or cuts in fuel vapor hoses or tubes, an EVAP canister vent valve that does not close properly, a damaged, missing or loose fuel filler cap (if equipped), a capless fuel tank filler pipe that is not sealed correctly (if provided), flexible fuel vapor hose or tube connections to the EVAP system components, or EVAP system component seals that are leaking. To correct this issue, it is important to ensure all EVAP components meet Ford’s specifications, replace any damaged hoses or tubes, check the EVAP canister vent valve for proper operation, replace or tighten the fuel filler cap, install the supplemental fueling adapter five times to clear debris on the seal, tighten all loose connections, and examine and replace any leaking seals.
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Conclusion
Ford Code P0442 is an issue that can indicate a potential problem with a Ford vehicle’s emissions control system. It is important to diagnose and rectify this issue as soon as possible to avoid any potential damage to the car. To do this, it is important to ensure the EVAP components meet Ford’s specifications, replace any damaged hoses or tubes, check the EVAP canister vent valve, replace or tighten the fuel filler cap, install the supplemental fueling adapter five times to clear debris on the seal, tighten all loose connections, and examine and replace any leaking seals. Following these steps, drivers can safely and successfully address the Ford Code P0442 EVAP System Leak Detected (Small Leak) diagnostic trouble code and keep their vehicles running smoothly.
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