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Diagnostic Procedure
NGEC0191
1 CHECK 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 䊳 GO TO 2.
NG 䊳 Repair or replace.
2 CHECK FOR INTAKE AIR LEAK
Listen for an intake air leak between the mass air flow sensor and the intake manifold.
OK or NG
OK 䊳 GO TO 3.
NG 䊳 Repair or replace.
DTC P0171 FUEL INJECTION SYSTEM FUNCTION
(LEAN SIDE)
KA24DE
Diagnostic Procedure
EC-283
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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