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.

Rear HO2S voltage monitor

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

Fig 1: Rear HO2S Voltage 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: Rear HO2S Voltage Chart (Unit Sec.)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Rear HO2S slow response monitor

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

Fig 3: Rear HO2S Slow Response Chart (Unit Sec.)

Rear HO2S element monitor

If all the values ($81, $84, $85 and $87) are out of the standard values, the ECM interprets this as a malfunction.

Fig 4: Rear HO2S Element Chart