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Possible Cause
NHEC0436
I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor1 (front)
SEF174Y
DTC Confirmation Procedure
NHEC0120
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II
NHEC0120S01
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Turn ignition switch “ON”.
4) Select “DATA MONITOR” mode with CONSULT-II.
5) Restart engine and let it idle for 25 seconds.
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-235.
WITH GST
NHEC0120S02
1) Start engine and warm it up to normal operating temperature.
2) Turn ignition switch “OFF” and wait at least 10 seconds.
3) Restart engine and let it idle for 25 seconds.
4) Turn ignition switch “OFF” and wait at least 10 seconds.
5) Restart engine and let it idle for 25 seconds.
6) Select “MODE 3” with GST.
7) If DTC is detected, go to “Diagnostic Procedure”, EC-235.
I When using GST, “DTC Confirmation Procedure” should
be performed twice as much as when using CONSULT-II
because GST cannot display MODE 7 (1st trip DTC) con-
cerning this diagnosis. Therefore, using CONSULT-II is
recommended.
DTC P0134 (BANK 1), P0154 (BANK 2) HO2S1 (FRONT) (HIGH VOLTAGE)
Possible Cause
EC-232
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