Component Inspection

P0171 System too Lean (Bank 1)

Inspection/Repair - Component Inspection

Component Inspection

Positive Crankcase Ventilation (PCV)
1. IG "OFF" and remove PCV valve from rocker cover.
2. Insert a thin screwdriver into the PCV valve from the threaded side and verify that the plunger is moving.
3. Does the PCV valve move normally?





Injector Inspection
1. Start engine.
2. Using GDS, check for RPM decrease when doing the "Injector Actuation" test.
3. Is there any cylinder with no change in RPM or only a small change in RPM?