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:
Rear seat
Exploded View
Rear seatback assembly (rh)
Seatback striker
Seatback latch release knob
Seatback latch assembly
Seatback silencer (RH)
Rear seatback frame (rh)
Seatback latch release knob finisher
Rear seat bolster trim (RH)
Rear seat bolster pad (RH)
Rear seat bolster (rh)
...
DTC/Circuit diagnosis
U0073 COMMUNICATION BUS A OFF
DTC Logic
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
U0073
COMM BUS A OFF
(Control Module Communication
Bus A Off)
TCM communication blockage lasts for 2 sec ...
Periodic maintenance
CVT FLUID
Inspection
FLUID LEAKAGE
Check transaxle surrounding area (oil seal and plug etc.) for fluid
leakage.
If anything is found, repair or replace damaged parts and adjust
CVT fluid level. Refer to TM-251, "Adjustment".
Replacement
CVT fluid : Refer to TM-288, & ...
