LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2003 >> Spectra Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Engine Sensors & Switches >> Heated Oxygen Sensor >> Sorento
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Heated Oxygen Sensor: Sorento

  1. Disconnect front or rear HO2S 4-pin harness connector. At front or rear HO2S side connector measure resistance between terminals No. 3 and 4. see Figure. HO2S heater resistance should be between 11.0-14.0 ohms at 68°F (20°C). If HO2S is not as specified, replace HO2S.
  2. Connect HO2S connector. Start and run engine at normal operating temperature for at least 10 minutes. Using scan tool, lab scope or voltmeter, monitor appropriate HO2S signal. If using voltmeter or lab scope, connect positive lead to right front HO2S harness connector terminal No. 2 (White wire) or to left front HO2S harness connector terminal No. 2 (Green wire). Connect negative lead to ground. On rear HO2S, connect positive lead to right rear HO2S connector terminal No. 2 (Yellow wire) or to left rear HO2S connector terminal No. 2 (Blue wire). Signal should switch from lean to rich, or rich to lean, at least 3 times every 10 seconds. Front HO2S signal should switch between 0-1 volt. Rear HO2S signal should switch between .6-.9 volt. If HO2S is not as specified, replace HO2S.
scientia non olet · About LEMON Manuals