Nissan Sentra B18 (2020-2025) Service Manual: P1148 Closed Loop Control
Dtc Description
DTC DETECTION LOGIC
|
DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
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|
P1148 |
CLOSED LOOP-B1 (Closed loop bank 1) |
Diagnosis condition |
— |
|
Signal (terminal) |
— |
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|
Threshold |
The closed loop control function does not operate even when Nissan Sentra vehicle is being driven in the specified condition |
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Diagnosis delay time |
— |
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POSSIBLE CAUSE
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Harness or connectors (A/F sensor 1 circuit is open or shorted.)
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A/F sensor 1
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A/F sensor 1 heater
FAIL-SAFE
Not applicable
Confirmation Procedure
-
CHECK DTC PRIORITY
If DTC P1148 is displayed with another DTC for A/F sensor 1, perform the trouble diagnosis for the corresponding DTC.
Is applicable DTC detected?
YES >>Perform diagnosis of applicable. Refer to DTC Index.
NO >>INSPECTION END
P10cb Internal Control Module Fuel Injector
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble ...
P1197 Out of Gas
Dtc Description
DTC Description
This diagnosis result is detected when the fuel level of the fuel
tank is extremely low and the engine does not run normally.
DTC DETECTION LOGIC
...
Other materials:
Precaution for Work
When removing or disassembling each component, be careful not to damage
or deform it. If a component
may be subject to interference, be sure to protect it with a shop cloth.
When removing (disengaging) components with a screwdriver or similar
tool, be sure to wrap the component
with a ...
Dtc Diagnosis Procedure
DTC Diagnosis
Procedure
Note:
The Signal Tech II Tool [– (NI-50190)] can be used
to perform the following functions: Refer to the Signal Tech II User
Guide for additional information.
Activate and display TPMS sensor IDs
Display tire pressure reported ...
Basic inspection
Diagnosis and repair workflow
Work Flow
Detailed flow
1.Interview from the customer
Clarify customer complaints before inspection. First of all,
perform an interview utilizing stc-20, "diagnostic
work sheet" and reproduce symptoms as well as fully understand it. Ask customer
abou ...
