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Home >> Honda >> 2000 >> CR-V SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Controls - Self-Diagnostics - 3.2L & 3.5L) >> Diagnostic Trouble Code Identification >> DTC P0175: Bank 2 System Too Rich >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2000 Isuzu VehiCROSS, 2000 Isuzu Trooper, 2000 Isuzu Rodeo, 2000 Isuzu Amigo, and 2000 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. If any DTCs other than P0172 and P0175 are set, diagnose them first before proceeding. If no other DTCs are set, go to next step.
  3. Operate vehicle in closed loop mode while using scan tool to read BANK 2 L.T. FUEL TRIM values. If L.T. FUEL TRIM value is less than -15 percent for A/T and is less than -12 percent for M/T, go to step  5. If values are not as specified, go to next step.
  4. Using scan tool, read and record FAIL RECORDS data. Clear DTCs and operate vehicle within FAILURE RECORDS conditions. If scan tool indicates DTC P0175 FAILED THIS IGNITION, go to next step. If scan tool display is not as specified, check for an intermittent problem. See DIAGNOSTIC AIDS .
  5. If DTC P0172 is also set, go to next step. If DTC P0172 is not set, go to step  15.
  6. Check air filter element condition. Replace air filter element if necessary. Retest system. If air filter element is okay, go to next step.
  7. Check for collapsed or restricted air intake duct. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  8. Check MAF inlet screen for blockage or foreign objects which may partially block airflow sample through MAF sensor. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  9. Start engine. If a low or unsteady idle condition exists, go to next step. If idle is okay, go to step  11.
  10. Turn ignition off. Check throttle body bore and throttle plate for restriction or foreign objects. Check for clogged IAC passages. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  11. Disconnect vacuum hose from fuel pressure regulator and check it for presence of fuel. If fuel is present, replace fuel pressure regulator. Retest system. If no fuel is present, go to next step.
  12. Turn ignition on. On VehiCROSS, Use scan tool to read TP ANGLE while slowly depressing accelerator pedal. If TP ANGLE increases steadily from zero percent at closed throttle to 100 percent at wide open throttle, go to next step. On all other models, use scan tool to read TP1 ANGLE while slowly depressing accelerator pedal. If TP1 ANGLE increases steadily from a minimum of 8 percent at closed throttle to a maximum of 92 percent at wide open throttle, go to next step. On all models, if TP ANGLE or TP1 ANGLE does not increase as specified, go to step  21.
  13. Disconnect MAF sensor harness connector. Operate vehicle in closed loop mode while monitoring scan tool BANK 2 L.T. and BANK 2 S.T. FUEL TRIM. If both FUEL TRIM values decrease to about zero percent, go to step  22. If FUEL TRIM values do not decrease to about zero percent, go to next step.
  14. Perform FUEL SYSTEM PRESSURE TEST. See BASIC DIAGNOSTIC PROCEDURES article. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  15. Turn ignition on. Connect test light between canister purge solenoid connector terminals. If test light comes on, go to next step. If test light does not come on, go to step  19. Retest system.
  16. Using an ohmmeter, check for short circuit to ground on canister purge solenoid control circuit between PCM and canister purge solenoid. See appropriate appropriate wiring diagram in WIRING DIAGRAMS article. If a short was found, go to next step. If short circuit to ground does not exist, go to step  18.
  17. Repair the short to ground. After repairs, verify repair and retest for DTCs.
  18. Replace and reprogram PCM. See PROGRAMMING .
  19. Perform injector balance test. See FUEL SYSTEM in SYSTEM & COMPONENT TESTING article. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  20. Remove HO2S-1 and check for silicone contamination (powdery white deposit). If HO2S-1 is contaminated, replace HO2S-1. Retest system. If HO2S-1 is not contaminated, check for an intermittent problem. See DIAGNOSTIC AIDS .
  21. Check for loose TP sensor mounting screws. Tighten TP sensor as necessary. If mounting screws are tight, replace TP sensor. Retest system.
  22. Replace MAF sensor. Retest system.
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