33
Symptom
Check
Action
Refer-
ence
page
Sensor warranty expired
(O
2
)
This message indicates that the
oxygen sensor warranty has expired.
The oxygen sensor cannot be used for more
than one year.
The oxygen sensor can be used past the warranty
term. However, the following “Sensor life reached”
error will occur in time, and calibration and
measurements will not be possible. Prepare to
replace the sensor as soon as possible.
Sensor life prediction (O
2
)
This message indicates that the
oxygen sensor life is almost reached.
The oxygen sensor’s service life is
approaching.
The sensor can be used for a while after the message
appears, but the oxygen sensor output has dropped,
so calibration will not be possible in time. Prepare a
new oxygen sensor and replace.
26
Sensor life reached (O
2
)
This message indicates that the
oxygen sensor life has been reached.
The oxygen sensor has reached its service
life.
Measurements are possible, but the oxygen sensor
output has dropped, so calibration will not be
possible. After a short time, the “Cannot use sensor”
error message will appear, and measurements will
not be possible. Prepare a new oxygen sensor and
replace.
26
Cannot calibrate sensor
(O
2
)
This message indicates that the
calibration cannot be performed
because the oxygen sensor life has
been reached.
The oxygen sensor has reached its service
life.
Measurements are possible for a while, but the
oxygen sensor output has dropped, so calibration will
not be possible. Measurements will also be disabled
in time, so replace with a new oxygen sensor.
26
Cannot use sensor (O
2
)
This message indicates that the
oxygen sensor cannot be used
because it has reached its service
life.
The oxygen sensor has reached its service
life.
The oxygen sensor cannot be used because the
output has dropped and the sensor has reached its
service life. Replace with a new oxygen sensor.
26
Battery life reached
This message indicates that the
batteries have reached their life.
The batteries have reached their service life.
Replace the batteries with new ones.
1
Main unit fault
This message indicates that the
internal IC is faulty or there is noise.
Does the error message appear even
after the power is turned ON and OFF
two or three times?
Make a request for repairs.
37
Is the battery holder rusty?
37
