LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2013 >> Passat S, 2.5L Eng VIN P, Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> 2.5L - Generic Scan Tool - Engine Code(S): CBTA & CBUA >> St Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> EVAP System, Checking For Leaks >> Leak Checking
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Leak Checking

-- Using a Smoke tester, check the Evaporative Emission (EVAP) system for leaks.

NOTE:

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 .