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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Trouble Code Identification >> DTC P0442: EVAP System Small Leak Detected >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic II (OBD-II) system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in SELF-DIAGNOSTICS - INTRODUCTION article. After performing OBD-II system check, go to next step.
  2. Install Tech 2 scan tool. Check for DTCs. If DTC(s) P0452, P0453, P0461, P0462 or P0463 is also set, go to those DTC(s) in numerical order before proceeding. See DTC P0452: FUEL TANK PRESSURE SENSOR LOW VOLTAGE , DTC P0453: FUEL TANK PRESSURE SENSOR HIGH VOLTAGE , DTC P0461: FUEL LEVEL SENSOR CIRCUIT , DTC P0462: FUEL LEVEL SENSOR CIRCUIT LOW VOLTAGE  or DTC P0463: FUEL LEVEL SENSOR CIRCUIT HIGH VOLTAGE  . If DTC(s) do not exist, go to next step.
  3. Turn ignition on, with engine off. Using scan tool, command EVAP canister purge valve and EVAP vent solenoid on and off. If purge valve and vent solenoids click, go to next step. If purge valve and/or vent solenoid does not click, see PCM OUTPUTS DIAGNOSIS  in DTC P0440.
  4. Turn ignition off. Remove fuel filler cap. Turn ignition on. Observe fuel pressure value on scan tool. If fuel tank pressure is zero mm Hg, go to next step. If fuel tank pressure is not as specified, go to DTC P0452: FUEL TANK PRESSURE SENSOR LOW VOLTAGE  or DTC P0453: FUEL TANK PRESSURE SENSOR HIGH VOLTAGE  .
  5. Reinstall fuel cap. Using scan tool, command EVAP vent solenoid on (closed). Zero EVAP pressure and vacuum gauges on EVAP Pressure/Purge Cart (J-41413). Connect EVAP pressure/purge cart to EVAP service port. Attempt to pressurize EVAP system to 12 mm Hg. Monitor pressure using gauge on EVAP pressure/purge cart. If pressure can be achieved, go to next step. If pressure cannot be achieved, go to DTC P0452: FUEL TANK PRESSURE SENSOR LOW VOLTAGE  or DTC P0453: FUEL TANK PRESSURE SENSOR HIGH VOLTAGE  .
  6. Using scan tool, command EVAP vent solenoid on (closed). Using EVAP pressure/purge cart, pressurize EVAP system to 15 in. H2 O. Set rotary switch on pressure/purge cart to HOLD and observe EVAP pressure gauge. If pressure decreases to less than 10 in. H2 O within 2 minutes, go to next step. If pressure does not decrease to less than 10 in. H2 O within 2 minutes, go to DIAGNOSTIC AIDS .
  7. Disconnect fuel tank vapor and EVAP purge hoses from EVAP canister. Plug canister fitting for fuel tank vapor hose. Connect a vacuum pump to EVAP purge hose fitting on EVAP canister. Ensure EVAP vent solenoid is still commanded on. Apply 5 in. Hg. If vacuum holds, go to step  10. If vacuum does not hold, go to next step.
  8. Check for disconnected or damaged vent hose. Also, check for damaged EVAP canister. Repair as necessary. After repairs, go to step  12. If no problem is found, go to next step.
  9. Replace defective EVAP vent solenoid. After replacing solenoid, go to step  12.
  10. Check for missing or faulty fuel cap. Check for disconnected or leaking fuel tank vapor hose or disconnected or damaged EVAP purge hose. Also check quick-connect "O" rings for EVAP line connections. Repair as necessary. After repairs, go to step  12. If no problem is found, go to next step.
  11. Reconnect all components previously disconnected. Using scan tool, command EVAP vent solenoid on (closed). With EVAP pressure/purge cart connected to EVAP service port, attempt to pressurize EVAP system by leaving cart control knob in PRESSURIZE position. Using Ultrasonic Leak Detector (J-41413), locate and repair EVAP system leak. It may be necessary to partially lower fuel tank to examine hose connections at top of tank. After repair is completed, go to next step.
  12. Reconnect all components previously disconnected. Turn ignition on, with engine off. Using scan tool, command EVAP vent solenoid on (closed). Using EVAP pressure/purge cart, pressurize EVAP system to 15 in. H2 O. Set rotary switch on pressure/purge cart to HOLD, and observe EVAP pressure gauge. If pressure decreases to less than 10 in. H2 O within 2 minutes, system is functioning properly. If pressure gauge reading does not decrease to less than 10 in. H2 O within 2 minutes, repeat step 3)  .
  13. Using scan tool, select DTC, CLEAR INFO function. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter DTC P0442. Operate vehicle within conditions for setting this DTC. If scan tool indicates TEST RAN AND PASSED, go to next step. If scan tool did not indicate TEST RAN AND PASSED, repeat step  2.
  14. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTC(s) are displayed, go to applicable DTC test.
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