Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Pontiac >> 2003 >> Sunfire Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P0171: Fuel Trim System Lean >> Test Description

Test Description

The number below refer to the step number on the diagnostic procedure.

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