DTC P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2)
DTC DETECTING CONDITION:
- Two consecutive driving cycles with fault
- GENERAL DESCRIPTION < Ref. to DTC P0139 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 2) , Diagnostic Trouble Code (DTC) Detecting Criteria. >
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to
OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to
PROCEDURE , Inspection Mode. >
WIRING DIAGRAM:
PROBLEMS DIAGNOSTIC CHART
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FOR ANY OTHER DTC ON DISPLAY. | Is any other DTC displayed? | Inspect the relevant DTC using "List of Diagnostic Trouble Code (DTC)". < Ref. to
LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >
NOTE:
In this case, it is not necessary to inspect DTC P0139.
|
Replace the rear oxygen sensor. < Ref. to REAR OXYGEN SENSOR . > |