Nissan Sentra Service Manual: P1148 Closed loop control
DTC Logic
DTC DETECTION LOGIC
NOTE:
DTC P1148 is displayed with DTC for A/F sensor 1.
When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
| P1148 | CLOSED LOOP-B1 (CLOSED LOOP-B1) | The closed loop control function does not operate even when vehicle is being driven in the specified condition. |
|
Diagnosis Procedure
DTC P1148 is displayed with DTC for A/F sensor 1.
When the DTC is detected, perform the trouble diagnosis of DTC corresponding to A/F sensor 1.
Refer to EC-94, "DTC Index".
P1078 EVT Control position sensor
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1078
EXH TIM SEN/CIRC-B1
(Exhaust val ...
P117A AIR Fuel ratio
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P117A is displayed with other DTC, first perform the trouble
diagnosis for the other DTC. Refer
to EC-94, "DTC Index".
DTC No.
CON ...
Other materials:
P0447 EVAP Canister vent control valve
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0447
VENT CONTROL VALVE
(Evaporative emission system vent
control circuit open)
An improper voltage signal is sent to
ECM throug ...
Basic inspection
Diagnosis and repair workflow
Work flow
Overall sequence
Detailed flow
1.Obtain information about symptom
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction occurred.
>> GO TO 2.
2.Check symptom
...
Precaution for Liquid Gasket
REMOVAL OF LIQUID GASKET
After removing nuts and bolts, separate the mating surface, using Tool
and remove old liquid gasket.
Tool number : KV10111100 (J-37228)
CAUTION:
Be careful not to damage the mating surfaces.
Tap (1) Tool to insert it, and then slide it (2) by tapping on t ...
