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DTC P0440: Evaporative (EVAP) Control System Malfunction DTC P0455: Evaporative (EVAP) Control System Leak Detected

NOTE: Ensure fuel filler cap is tightened securely and gasket is in good condition. Inspect vacuum hoses for kinks, loose connections and deterioration before testing EVAP system.
  1. Check evaporative canister purge system for proper operation. See EVAP CANISTER PURGE SYSTEM (VITARA 1.6L & 2.0) in SYSTEM & COMPONENT TESTING article. If evaporative system operation is as specified, go to step  3 . If operation is not as specified, go to next step.
  2. Check evaporative canister purge valve and circuit operation. See EVAP CANISTER PURGE VALVE in SYSTEM & COMPONENT TESTING article. If canister purge valve operation is as specified, go to next step. If operation is not as specified, check for clogged vacuum passage. Clean or repair as necessary. If vacuum passage is okay, go to step  10 .
  3. Check evaporative canister air valve and circuit operation. See EVAP CANISTER AIR VALVE CIRCUIT in SYSTEM & COMPONENT TESTING article. If evaporative canister air valve operation is as specified, go to next step. If operation is not as specified, go to step  11 .
  4. Check tank pressure control solenoid valve and circuit operation. See FUEL TANK PRESSURE CONTROL SOLENOID VALVE in SYSTEM & COMPONENT TESTING article. If tank pressure solenoid valve operation is as specified, go to next step. If operation is not as specified, go to step  12 .
  5. Check tank pressure control valve operation. See FUEL TANK PRESSURE CONTROL SOLENOID VALVE in SYSTEM & COMPONENT TESTING article. If tank pressure control valve operation is as specified, go to next step. If operation is not as specified, replace tank pressure control valve and retest system.
  6. Check evaporative canister for damage or clogged passages. See EVAP CANISTER in SYSTEM & COMPONENT TESTING article. If evaporative canister operation is as specified, go to next step. If operation is not as specified, replace evaporative canister and retest system.
  7. Inspect purge line, evaporative system components and fuel tank for leaks. See EVAP SYSTEM LEAKAGE CHECK in SYSTEM & COMPONENT TESTING article. If any leaks are found, repair or replace system or components as necessary. If no leaks are found, go to next step.
  8. Check fuel tank pressure sensor operation. See FUEL TANK PRESSURE SENSOR in SYSTEM & COMPONENT TESTING article. If fuel tank pressure sensor operation is not as specified, replace sensor and retest system. If operation is as specified, go to next step.
  9. Check fuel level sensor operation. See DTC P0461: FUEL LEVEL SENSOR CIRCUIT PERFORMANCE  . If fuel level sensor operation is not as specified, repair as necessary. If operation is as specified, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If no intermittent problems were found, replace PCM and retest system.
  10. Check evaporative canister purge valve and circuit operation. See EVAP CANISTER PURGE VALVE in SYSTEM & COMPONENT TESTING article. If canister purge valve operation is as specified, check Blue/Black wire between purge valve, main relay and PCM for open or short circuit. Also check Green/Black wire between purge valve and PCM for open or short circuit. Repair as necessary. If wiring is okay and scan tool was used to check system, replace PCM and retest system. If canister purge valve operation is not as specified, replace canister purge valve.
  11. Check evaporative canister air valve and circuit operation. See EVAP CANISTER AIR VALVE CIRCUIT in SYSTEM & COMPONENT TESTING article. If canister air valve operation is as specified, check Blue/Black wire between air valve, main relay and PCM for open or short circuit. Also check Purple/Red wire between air valve and PCM for open or short circuit. Repair as necessary. If wiring is okay and scan tool was used to check system, replace PCM and retest system. If canister air valve operation is not as specified, replace canister air valve.
  12. Check tank pressure control solenoid valve operation. See FUEL TANK PRESSURE CONTROL VALVE in SYSTEM & COMPONENT TESTING article. If tank pressure control solenoid valve operation is as specified, check Blue/Black wire between solenoid valve, main relay and PCM for open or short circuit. Also check Green/White wire between solenoid valve and PCM for open or short circuit. Repair as necessary. If wiring is okay and scan tool was used to check system, replace PCM and retest system. If tank pressure control solenoid valve operation is not as specified, replace canister purge valve.
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