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Diagnostic Procedure
NFEC0887
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEC047D
© GO TO 2.
2 RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten corresponding heated oxygen sensor 1.
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
© GO TO 3.
3 CHECK FOR EXHAUST AIR LEAK
1. Start engine and run it at idle.
2. Listen for an exhaust air leak before three way catalyst.
SEF099P
OK or NG
OK © GO TO 4.
NG © Repair or replace.
4 CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK © GO TO 5.
NG © Repair or replace.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0133, P0153 HO2S1
Diagnostic Procedure
EC-233
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