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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0175: Fuel Trim System Rich - Bank 2 >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
    NOTE: If other DTCs are present, except P0172 and P0175, diagnose other DTCs first.
  2. Warm engine to normal operating temperature. Ensure system is in closed-loop. Using scan tool, select FUEL TRIM DATA LIST and monitor LF FT BN 2. If LT FT BN 2 displayed value is greater than -13 percent, go to next step. If displayed value is not greater than -13 percent, go to step  4.
  3. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data and note parameters. Turn ignition off for about 15 seconds. Start engine and operate vehicle within conditions required for this diagnostic to run, and as close to conditions recorded in FREEZE FRAME/FAILURE RECORDS as possible. Select DTC function, and then enter this DTC. If scan tool indicates that this test failed this ignition, go to next step. If scan tool does not indicate that this test failed this ignition, see DIAGNOSTIC AIDS .
  4. If DTC P0172 is also present, go to next step. If DTC P0172 is not present, go to step  6.
  5. Check for collapsed air intake duck, restricted air filter, improperly mounted MAF sensor, foreign objects blocking inlet screen or for fuel in pressure regulator hose. Repair as necessary. After repairs, go to step  7. If problem is not found or repairs are not necessary, diagnose fuel system. See BASIC FUEL SYSTEM CHECKS in appropriate SYSTEM & COMPONENT TESTING article.
  6. Check for leaking fuel injectors on bank 2. If fuel injectors are leaking, go to step  9. If fuel injectors are okay, go to step  8.
  7. Repair or replace affected components. After repairs, go to step  9.
  8. Replace faulty HO2S. After repairs, go to next step.
  9. Using scan tool, clear DTCs. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, and then enter this DTC. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  10. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. If no undiagnosed DTCs are displayed, system is okay.
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