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Possible Cause
NHEC0441
I Harness or connectors
(The sensor circuit is open or shorted.)
I Heated oxygen sensor 2 (rear)
SEF189Y
DTC Confirmation Procedure
NHEC0158
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 10 seconds
before conducting the next test.
WITH CONSULT-II
NHEC0158S01
1) Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
3) Stop vehicle with engine running.
4) Let engine idle for 1 minute.
5) Maintain the following conditions for at least 5 consecutive
seconds.
ENG SPEED 1,300 - 3,100 rpm
VHCL SPEED SE 64 - 130 km/h (40 - 81 MPH)
B/FUEL SCHDL 0.5 - 6.4 msec
COOLAN TEMP/S 70 - 100°C (158 - 212°F)
Selector lever Suitable position
6) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-281.
SEF312XB
Overall Function Check
NHEC0159
Use this procedure to check the overall function of the heated oxy-
gen sensor 2 (rear) circuit. During this check, a 1st trip DTC might
not be confirmed.
WITH GST
NHEC0159S01
1) Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2) Stop vehicle with engine running.
3) Set voltmeter probes between ECM terminal 72 [HO2S2 (B1)
signal] or 71 [HO2S2 (B2) signal] and engine ground.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0140 (BANK 1), P0160 (BANK 2) HO2S2 (REAR) (HIGH VOLTAGE)
Possible Cause
EC-277
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