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Home >> Suzuki >> 2002 >> XL-7 Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0442 Or DTC P0455 >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Check fuel filler cap for tightness. Check fuel filler cap gasket for proper sealing. Tighten cap or replace as necessary. After repair, repeat DTC CONFIRMATION TEST . If fuel filler cap is okay, go to next step.
  3. Check vacuum hoses for proper connection, leakage, plugging, and deterioration. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST . If no problem is found, go to next step.
  4. Check EVAP-CPV for proper operation. See EVAP CANISTER PURGE VALVE CIRCUIT under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If EVAP-CPV operation is as specified, go to next step. If EVAP-CPV operation is not as specified, replace EVAP-CPV. After repair, repeat DTC CONFIRMATION TEST .
  5. Check EVAP-CVV circuit operation. See EVAP CANISTER VENT VALVE CIRCUIT under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If EVAP-CVV and circuit operation is as specified, go to next step. If EVAP-CVV and circuit operation is not as specified, replace EVAP-CVV. After repair, repeat DTC CONFIRMATION TEST .
  6. Check EVAP canister for damage or clogged passages. See EVAP CANISTER under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If EVAP canister operation is as specified, go to next step. If EVAP canister operation is not as specified, replace EVAP canister. After repair, repeat DTC CONFIRMATION TEST .
  7. Inspect purge line, evaporative system components and fuel tank for leaks. See EVAP SYSTEM LEAKAGE CHECK under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If any leaks are found, repair or replace system or components as necessary. After repair, repeat DTC CONFIRMATION TEST . If no leaks are found, go to next step.
  8. Check FTP sensor operation. See FUEL TANK PRESSURE SENSOR under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article. If FTP sensor operation is not as specified, replace sensor. After repair, repeat DTC CONFIRMATION TEST . If FTP sensor operation is as specified, go to next step.
  9. Check fuel level sensor operation. For testing procedure, go to DTC P0461 . If fuel level sensor operation is not as specified, repair or replace fuel level sensor as necessary. After repair, repeat DTC CONFIRMATION TEST . If fuel level sensor operation is as specified, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If intermittent problem is not found, substitute a known good ECM and repeat DTC CONFIRMATION TEST . If DTC does not reset, testing is complete.
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