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On Board Diagnosis Logic
NGEC0808
★ The closed loop control has the one trip detection logic.
Malfunction is detected when the closed loop control function for
right bank does not operate even when vehicle is driving in the
specified condition, the closed loop control function for left bank
does not operate even when vehicle is driving in the specified
condition.
POSSIBLE CAUSE
NGEC0808S01
쐌 The heated oxygen sensor 1 (front) circuit is open or shorted.
쐌 Heated oxygen sensor 1 (front)
쐌 Heated oxygen sensor 1 heater (front)
DTC Confirmation Procedure
NGEC0809
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 5 seconds before
conducting the next test.
TESTING CONDITION:
쐌 Never raise engine speed above 3,200 rpm during the
“DTC Confirmation Procedure”. If the engine speed limit is
exceeded, retry the procedure from step 2.
쐌 Before performing the following procedure, confirm that
battery voltage is more than 11V at idle.
SEF967Y
With CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Hold engine speed at 2,000 rpm and check one of the follow-
ing.
쐌 “HO2S1 (B1)/(B2)” voltage should go above 0.70V at least
once.
쐌 “HO2S1 (B1)/(B2)” voltage should go below 0.21V at least
once.
If the check result is NG, perform “Diagnosis Procedure”,
EC-1050.
DTC P1148 (RIGHT BANK, -B1), P1168 (LEFT BANK, -B2)
CLOSED LOOP CONTROL
VG33E
On Board Diagnosis Logic
EC-1049
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
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