Thankfully, we were able to hang on to this truck a few days at the shop to make sure the check engine light did not come back on.Īn advanced scan tool can eliminate the need to wait for a couple of days by forcing the truck to do an EVAP leak test. It's important to remember that EVAP codes may take a couple days to reappear if the problem was not resolved. Since this truck is pretty old (20 years), I could be looking for a cracked hose or faulty component. Anywhere there are EVAP lines and components, then that is where I have to look. It could be somewhere in the engine compartment or under the truck. The scan tool defined P0442 as "Evaporative Emission System Leak Detected (small leak)". When I connected my scan tool to the truck, I found that it had the DTC (diagnostic trouble code) P0442. The owner of a 2002 Dodge Ram 1500 came into the shop with a complaint of a check engine light. When your vehicle has a P0442 code, it is typically okay to drive, but should be looked at as soon as possible. You should always repair any EVAP issue and consult with a professional mechanic if you have questions about driving with an EVAP issue. This should include a smoke test to locate the leak. What you'll be paying for is diagnostics and an hour of labor at least. The cost of fixing a P0442 code depends on the location and severity of the leak.Ī leak in a hard-to-reach area may require multiple hours to find and repair. How much does it cost to fix the P0442 code? Here is a list of possible areas that can have a small EVAP leak:ĮVAP Hose or Vacuum Lines - Rubber hoses can crack and slowly leak.įuel Pump Gasket - Located on top of the gas tank, the fuel pump gasket can develop a small leak over time. Some possible causes for a P0442 code are old age of rubber lines and faulty parts. In some cases, there actually may not be a leak, but a component failure.įor example, a purge valve or vent valve may be partially stuck open and releasing fuel vapors. The key is to inspect all of the lines and hoses of the EVAP system for any damage, then test each component for proper function. Even with proper tooling, like a smoke machine, it can still be difficult to find the leak. The code P0442 can be a difficult problem to solve because of the size of the leak. To learn more about the EVAP system, check out this article. The EVAP system prevents fuel vapors to not escape your vehicle. Fuel vapors in your gas tank are trapped by the EVAP system and then used in the engine. The EVAP system works in conjunction with the fuel system on your car.
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