Nissan Sentra manuals

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.
  • Harness or connectors (A/F sensor 1 circuit is open or shorted.)
  • A/F sensor 1
  • A/F sensor 1 heater

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:

Servicing air conditioner (if so equipped)
The air conditioner system in your NISSAN vehicle is charged with a refrigerant designed with the environment in mind. This refrigerant does not harm the earth’s ozone layer. Special charging equipment and lubricant is required when servicing your NISSAN air conditioner. Using improper re ...

Shift position indicator circuit
Component Parts Function Inspection 1.CHECK SHIFT POSITION INDICATOR Start the engine. Shift selector lever. Check that the selector lever position and the shift position indicator on the combination meter are identical. Is the inspection result normal? YES >> INSPECTION END N ...

Power supply and ground circuit
WITH INTELLIGENT KEY SYSTEM WITH INTELLIGENT KEY SYSTEM : Diagnosis Procedure Regarding Wiring Diagram information, refer to BCS-51, "Wiring Diagram". 1.Check fuses and fusible link Check that the following fuses and fusible link are not blown. Is the fuse blown? Yes >> r ...

© 2014-2024 Copyright www.nisentra.com