LEMON Manuals: Even more car manuals for everyone
Home >> Oldsmobile >> 1996 >> Aurora >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0175 - Fuel Trim System Rich Bank 2 >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. Using scan tool, check if any other DTC(s) are present. If other DTC(s) are present, diagnose affected DTC(s) first. If no other DTC(s) are present, go to next step.
  3. Start an warm engine until coolant temperature reaches 185°F (85°C) or greater. Using scan tool, monitor LONG TERM BN. 1 and SHRT. TERM BN. 1 status. If either values are less than -95 or -98 percent, go to next step. If either values are greater than -95 or -98 percent, go to step 5).
  4. Using FREEZE FRAME data, note conditions under which the DTC set. Clear DTC and operate vehicle under the conditions that set DTC. Using scan tool, select NOT RUN SCC and TEST FAIL SCC to verify that this diagnostic test runs while duplicating test conditions. If this diagnostic test ran and failed this ignition cycle, go to next step. If this diagnostic test did not ran or did not fail in this ignition cycle, see DIAGNOSTIC AIDS.
  5. If DTC P0172 is also present, go to next step. If DTC P0172 is not present, go to step 7).
  6. Check for collapsed air intake duct, restricted air filter, improperly installed MAF sensor or for foreign objects blocking MAF sensor screen. Check for fuel in pressure regulator vacuum hose. If problem is found, go to step 8). If problem is not present, see DIAGNOSTIC AIDS.
  7. Inspect for leaking injectors at bank 1. Repair as necessary. If injectors are okay, go to step 9).
  8. Repair or replace any faulty components.
  9. Replace rear HO2S.
scientia non olet · About LEMON Manuals