Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Pontiac >> 2007 >> G6 Base, 2.4 B >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 2.4L - DTC P0420 To DTC P2544 >> DTC P0506 or P0507 >> Circuit/System Testing

Circuit/System Testing

  1. Inspect for any condition that can reduce idle speed by increasing engine load.
    • Incorrect torque converter clutch (TCC) operation
    • Accessories that require additional torque to operate
    • Excessive deposits in the throttle body
    • Restricted exhaust
    • Mechanical conditions that limit engine speed
  2. Inspect for any condition that can increase idle speed.
    • Vacuum leaks
    • Un-metered air entering the engine, after the mass airflow
    • A faulty positive crankcase ventilation (PCV) valve
scientia non olet · About Mike's Workshop Manuals