LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chevrolet >> 2001 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Heated Oxygen Sensor No. 2
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Heated Oxygen Sensor No. 2

Heated Oxygen Sensor No. 2 (HO2S2) is mounted just after Warm-Up Three-Way Catalyst (WU-TWC). HO2S2 operates similar to HO2S1 and is used by PCM to monitor catalyst efficiency. HO2S2 is normal when its activity appears lazy or inactive. For component locations, see Figure or Figure .

scientia non olet · About LEMON Manuals