Code P2420 Evaporative Emission System Switching Valve Control Circuit High

ID: 169631

Description: I am a BARBER by trade and a family man; I am...

Steps:

  1. NOTE: Carefully remove the rear seat; it is made of materials such as: Duroport, Styrofoam, polystyrene, etc.
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  2. Photo 1. Remove the fuel pump connector.
  3. - Start the engine until it turns off on its own. Repeat again and ensure it does not start. This is to release the pressure and consume the fuel in the lines.
  4. - Pry open the fuel tank filler cap. This is to release the pressure from the fuel tank.
  5. -Disconnect the NEGATIVE battery cable.
  6. Photo 2. Disconnect lines # 2, 3, and 4.
  7. Photo 3. Remove 8 screws and carefully remove the fuel pump. Note: Cover the fuel pump opening with a clean, sturdy plastic bag.
  8. -Drain the fuel from the tank.
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  9. Remove the 2 bolts that connect to the catalytic converter.
  10. Apply a little WD-40 to the 4 rubber mounts. It will be easier to remove them!
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  11. These are 2 identical or similar plastic protectors. #1 and 2.
  12. Remove the screws and clips.
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  13. Great job, let's continue.
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  14. Remove the 4 bolts from the sway bar bracket.
  15. You're doing great; the most important tool next is PATIENCE!
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  16. Photo 1. Disconnect the main fuel tank pipe subassembly.
  17. Note: ⚠️ CAUTION there may be a small fuel spill.
  18. Photo 2. Disconnect the fuel tank breather elbow pipe subassembly.
  19. Photo 3. Disconnect the fuel tank vent hose.
  20. Photo 4. Continued in step 8, Title: REMOVE THE FUEL TANK.
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  21. (Below is the last photograph from Step 7.)
  22. Photograph 4. Disconnect the fuel tank from the filler hose or pipe. End of Step 7!
  23. Step 8:
  24. Photograph 1. Support the fuel tank with an engine hoist or a hydraulic jack. You can use the jack from your Camry!
  25. Note: You will be able to see a mark on the bottom of the fuel tank; it is the center of the tank, which is where you should position your jack. This will provide stability when lowering the fuel tank.
  26. Photograph 2. Remove the 4 bolts from the 2 fuel tank straps or brackets.
  27. Lower the engine hoist or the jack to remove the fuel tank.
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  28. Photo 1. Disconnect the lines.
  29. Note: disconnect the lines carefully, do not puncture the air hoses, remove the electrical connector without damaging it.
  30. Photo 2. Remove 3 screws and clips.
  31. Photo 3. Component Illustration.
  32. Remove the Charcoal Canister assembly, take it to your workbench, and perform the following tests!....
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  33. Visually inspect the charcoal canister assembly for cracks or damage.
  34. If cracks or damage are found, replace the charcoal canister assembly.
  35. The charcoal canister and the leak detection pump form an ASSEMBLY.
  36. Photo 1. Check the canister operation. With the purge port closed, blow 5 kPa (0.7 psi) of air into the vent line port and check that air flows out of the air line port.
  37. If the result is not as specified, replace the charcoal canister assembly.
  38. Photo 2. With the vent port closed, blow 5 kPa (0.7 psi) of air into the air line port and check that air flows out of the purge line port.
  39. If the result is not as specified, replace the charcoal canister assembly.
  40. Photo 3. Check for air leaks in the charcoal canister. See the video in the introduction of this guide.
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  41. Photo 1. Check the charcoal canister leak detection pump sub-assembly. Connect a positive (+) battery cable to terminal 5 and a negative (-) cable to terminal 1. Use cables with alligator clips and your Camry battery!
  42. Check that a clicking sound is heard from the leak detection pump. If the result is not as specified, replace the charcoal canister leak detection pump.
  43. In my result, the leak detection pump clicked..!
  44. It is normal for there to be an air leak at the electrical connector.
  45. Important note: The pump module is an assembly and it has 2 more components integrated into it: the Vent Valve and the Charcoal Canister Pressure Sensor.
  46. When the Vent Valve gets stuck, it triggers Code P2420. Change the leak detection pump for a new one and the Check Engine light will clear when you turn your Camry back on!
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