DTC P1148, P1168: Closed Loop Control
These self-diagnoses have the one trip detection logic.
DTC DETECTING CONDITION AND POSSIBLE CAUSE
| DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause |
|---|---|---|---|
| P1148 1148 (Bank 1) |
Closed loop control function | The closed loop control function for bank 1 does not operate even when vehicle is being driven in the specified condition. |
|
| P1168 1168 (Bank 2) |
The closed loop control function for bank 2 does not operate even when vehicle is being driven in the specified condition. |
DTC P1148 or P1168 is displayed with another DTC for air fuel ratio (A/F) sensor 1.
Perform the trouble diagnosis for the corresponding DTC.