Nissan Sentra B18 (2020-2025) Service Manual: P1148 Closed Loop Control
Dtc Description
DTC Description
DTC DETECTION LOGIC
|
DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition |
|
|
P1148 |
CLOSED LOOP-B1 (Closed loop bank 1) |
Diagnosis condition |
— |
|
Signal (terminal) |
— |
||
|
Threshold |
The closed loop control function does not operate even when Nissan Sentra vehicle is being driven in the specified condition |
||
|
Diagnosis delay time |
— |
||
POSSIBLE CAUSE
-
Harness or connectors (A/F sensor 1 circuit is open or shorted.)
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A/F sensor 1
-
A/F sensor 1 heater
FAIL-SAFE
Not applicable
Confirmation Procedure
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
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Manifold Absolute Pressure Sensor
Component Inspection
Component Inspection
CHECK MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR-1
Turn ignition switch OFF.
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B1036-16 Ignition Voltage
Dtc Description
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen items
(Trouble diagnosis
content)
DTC Detection Condition
...