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Home >> Oldsmobile >> 2002 >> Bravada AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Self-Diagnostics - 4.2L >> Diagnostic Tests >> DTC P0171: Fuel Trim System Lean >> Test Description

Test Description

The numbers below refer to the step numbers on the diagnostic procedures.

  1. 5

    If conditions were not corrected, see appropriate BASIC DIAGNOSTIC PROCEDURES article.
  2. 6

    If conditions were not corrected, a worn cam, worn intake or exhaust valves, or other engine mechanical failures may be at fault.