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SEF298U
On Board Diagnosis Logic
NGEC0122
To judge the malfunction of heated oxygen sensor 1 (front), this
diagnosis measures response time of heated oxygen sensor 1
(front) signal. The time is compensated by engine operating (speed
and load), fuel feedback control constant, and heated oxygen sen-
sor 1 (front) temperature index. Judgment is based on whether the
compensated time [heated oxygen sensor 1 (front) cycling time
index] is inordinately long or not.
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0133 쐌 The response of the voltage signal from the sensor takes
more than the specified time.
쐌 Harness or connectors
(The sensor circuit is open or shorted.)
쐌 Heated oxygen sensor 1 (front)
쐌 Heated oxygen sensor 1 heater (front)
쐌 Fuel pressure
쐌 Injectors
쐌 Intake air leaks
쐌 Exhaust gas leaks
쐌 PCV
쐌 Mass air flow sensor
SEF656Y
SEF657Y
SEF658Y
DTC Confirmation Procedure
NGEC0123
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch OFF and wait at least 5 seconds before
conducting the next test.
TESTING CONDITION:
쐌 Always perform at a temperature above −10°C (14°F).
쐌 Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Stop engine and wait at least 5 seconds.
3) Turn ignition switch ON and select “HO2S1 (B1) P0133” of
“HO2S1 (front)” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
4) Touch “START”.
5) Start engine and let it idle for at least 3.0 minutes.
NOTE:
Never raise engine speed above 3,000 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6) When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It
will take approximately 20 seconds.)
ENG SPEED 1,750 - 3,750 rpm
Vehicle speed More than 80 km/h (50 MPH)
B/FUEL SCHDL 3.5 - 15.5 msec
Selector lever Suitable position
DTC P0133 HEATED OXYGEN SENSOR 1 (FRONT)
(RESPONSE MONITORING)
KA24DE
On Board Diagnosis Logic
EC-215
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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