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DTC Description
 
 
DTC DETECTION LOGIC
noteDTC 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.
DTCM.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
P114800CLOSED LOOP-B1
(Closed loop —b1)
Diagnosis condition—
Signal (terminal)—
ThresholdThe closed loop control function does not operate even when 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.)
  • A/F sensor 1
  • A/F sensor 1 heater
 
 
FAIL-SAFE
Not applicable
 
 
DTC Confirmation Procedure
1.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?
Perform diagnosis of applicable. Refer to DTC Index.
INSPECTION END