how to repair a leaky EVAP system in Porsche Cayenne E3 (2018-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, smoke machine, basic hand tools, torque wrench.
• Ensure the vehicle is parked on a level surface.
• Disconnect the negative battery terminal.

2. Replace Damaged Hose

1. Locate the Leak:
   • Use the smoke machine to introduce smoke into the EVAP system. Observe where the smoke escapes to pinpoint the leak.
2. Remove the Damaged Hose:
   • Using pliers, carefully disconnect the hose from both ends.
   • Check for any clamps that may need to be removed with a socket or screwdriver.
3. Install New Hose:
   • Connect the new hose, ensuring a secure fit on both ends.
   • Reattach any clamps or securing devices.

3. Replace Purge Valve (if necessary)

1. Remove the Old Purge Valve:
   • Disconnect the electrical connector from the purge valve.
   • Remove the mounting screws using a socket wrench.
   • Pull the valve out of the rubber grommet.
2. Install New Purge Valve:
   • Insert the new purge valve into the rubber grommet.
   • Secure it with mounting screws and reconnect the electrical connector.

4. Replace Fuel Filler Cap (if necessary)

1. Remove Old Fuel Cap:
   • Unscrew the old fuel filler cap and discard it.
2. Install New Fuel Filler Cap:
   • Screw the new fuel cap onto the filler neck until it clicks, ensuring a tight seal.

5. Final Checks

1. Reconnect Battery:
   • Reconnect the negative battery terminal.
2. Clear Engine Codes:
   • Use the OBD-II scanner to clear any error codes related to the EVAP system.
3. Test Drive:
   • Take the vehicle for a short drive to monitor for any reoccurrence of symptoms.