O2S Test Result

WARNING: This page is about a different car, the 2004 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Refer to PRE-CHECK for detailed information.

Front HO2S slow slope monitor

If the HO2S sensor voltage is out of the standard value, the ECM interprets this as a malfunction.

Fig 1: Front Ho2S Slow Slope Monitor Chart (Unit V)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the time required to change is out of the standard value, the ECM interprets this as a malfunction.

Fig 2: Front Ho2S Slow Slope Monitor Chart (Unit Sec.)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Front HO2S frequency monitor (idling)

If the $38 is out of the standard value, the ECM interprets this as a malfunction.

Fig 3: Front HO2S Frequency Monitor (Idling)

Front HO2S frequency monitor (cruse)

If the $90 is out of the standard value, the ECM interprets this as a malfunction.

Fig 4: Front HO2S Frequency Monitor (Cruse) Chart