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SEF010V
On Board Diagnosis Logic
NGEC0632
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.
Malfunction is detected when the response of the voltage signal
from the sensor takes more than the specified time.
POSSIBLE CAUSE
NGEC0632S01
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 valve
쐌 Mass air flow sensor
DTC Confirmation Procedure
NGEC0633
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.
DTC P0133, P0153 HEATED OXYGEN SENSOR 1 (FRONT)
(BANK 1)/(BANK 2) (RESPONSE MONITORING)
VG33E
On Board Diagnosis Logic
EC-808
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