DTC P0133 - Ho2S No. 1 Slow Response

WARNING: This page is about a different car, the 1996 Suzuki Swift. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If any DTCs besides DTC P0133 are set, diagnose them first. Before replacing HO2S No. 1, inspect sensor for contamination. If contamination is present, determine cause and repair before installing new HO2S No. 1.

Replace HO2S No. 1. If trouble returns, replace PCM. Retest system.