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6 CHECK FRONT HEATED OXYGEN SENSOR 1 (FRONT)
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 the following with engine speed held at 2,000 rpm constant under no load.
SEF796Z
CAUTION:
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
OK or NG
OK 䊳 GO TO 8.
NG 䊳 GO TO 7.
7 REPLACE HEATED OXYGEN SENSOR 1 (FRONT)
1. Turn ignition switch “OFF”.
2. Check heated oxygen sensor 1 (front) harness protector color.
SEF505Y
CAUTION:
Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool
J-43897-18 or J-43897-12 and approved anti-seize lubricant.
䊳 Replace malfunctioning heated oxygen sensor 1 (front).
DTC P0131, P0151 HEATED OXYGEN SENSOR 1 (FRONT)
(BANK 1)/(BANK 2) (LEAN SHIFT MONITORING)
VG33E
Diagnostic Procedure (Cont’d)
EC-796
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