The oxygen sensor (rear) converts the concentration of
oxygen in the exhaust emission into a voltage and inputs the signal to the engine-ECU.
When the air-fuel ratio is richer than the theoretical air-fuel ratio, the oxygen
sensor (rear) outputs a voltage of about 1 V. When it is leaner than the theoretical air-fuel
ratio, it outputs a voltage of about 0 V.
In response to the signal, the engine-ECU controls the fuel injection amount so
that the air-fuel ratio can be equivalent to the theoretical air-fuel ratio.
Engine coolant temperature is more than 76°C.
Oxygen sensor (front) is active.
Repeat 1 time or more: drive*1, stop*2.
Engine speed is more than 1,500 r/min.
Manifold absolute pressure is more than 53 kPa.
Vehicle speed is more than 30 km/h.
A total of more than 60 seconds have passed with the above mentioned conditions,
and more than 3 seconds have passed with the fuel shut off.
Vehicle speed is less than 1.5 km/h.
Change in the output voltage of the oxygen sensor (rear) is less than 0.098 volt.
The maximum output voltage of the oxygen sensor (rear) is less than 0.508
Monitoring stops after fuel has been shut off for 64 seconds or more.
Failed oxygen sensor (rear)
Harness damage in oxygen sensor (rear) circuit
STEP 1. M.U.T.-III data list
Item No. 10: Oxygen sensor (rear)
Is the check result normal?
STEP 2. Replace the oxygen sensor (rear)
After replacing the oxygen sensor (rear), reconfirm whether the diagnosis
code is set.