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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 379 (Engine Controls Self-Diagnostics - 3.4L) >> Diagnostic Tests >> DTC P0171: Fuel Trim System Lean >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, 2003 Chevrolet Monte Carlo, and 2003 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 5  - If the conditions were not corrected, refer to Fuel System Diagnosis for a possible fuel condition.
  2. 6  - If the conditions were not corrected, a worn cam, worn intake or exhaust valves, or other engine mechanical failures may be at fault.

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