Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
EVAP System, Checking For Leaks
Observe all safety precautions: SAFETY PRECAUTIONS
View clean working conditions: CLEAN WORKING CONDITIONS
Perform a preliminary check to verify the condition: PRELIMINARY CHECK .
Special Tools And Workshop Equipment Required
- Smoke tester.
- EVAP and Fuel Supply System Vacuum hose and line routing diagram.
Secure all hose connections using hose clamps appropriate for the model type
Replace seals and gaskets when performing repair work.
Leak Checking
-- Using a Smoke tester, check the Evaporative Emission (EVAP) system for leaks.
Always follow the manufacturers directions for the proper installation and operation of the smoke tester being used.
If A Leak Is Detected:
-- Check the fuel filler cap seal for damage and for proper installation. Replace if necessary.
-- Check all hose connections of the EVAP system and replace or repair any leaking lines.
-- Check all hose connections of the Fuel Supply system and replace or repair any leaking lines.
-- Remove the rear seat bench. Refer to the Repair Information.
-- Remove the floor cover seal.
-- Inspect the seal under the Fuel Delivery Unit (fuel pump) locking flange for proper sealing. Also check the fuel line connections.
-- Repair or replace any damaged component.
If No Leaks Are Found In The Evap Or Fuel Supply System:
-- Erase the DTC memory if a code was set. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
-- Perform a road test to verify repair.
Generate readiness code. Refer to READINESS CODE .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.