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SEF919UA
Overall Function Check
NGEC0620
Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
Without CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 50 (bank 1 signal)
or 51 (bank 2 signal) and engine ground.
3) Check one of the following with engine speed held at 2,000
rpm constant under no load.
쐌 The maximum voltage is over 0.6V at least one time.
쐌 The minimum voltage is over 0.1V at least one time.
4) If NG, go to “Diagnostic Procedure”, EC-792.
Diagnostic Procedure
NGEC0621
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws.
LEC518
䊳 GO TO 2.
2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40-60N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
䊳 GO TO 3.
DTC P0131, P0151 HEATED OXYGEN SENSOR 1 (FRONT)
(BANK 1)/(BANK 2) (LEAN SHIFT MONITORING)
VG33E
Overall Function Check
EC-792
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