DTC P0140
Rear HO2S circuit no activity detected
Diagnostic procedure
STEP
1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See
F66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
2
VERIFY RELATED PENDING AND STORED
DTCS
Note
• If fuel monitor DTC, DTC P0131or P0132 is
retrieved, ignore it until P0140 is fied.
• Turn ignition key to OFF, then ON (Engine
OFF).
• Verify pending and stored DTCs using WDS or
equivalent.
• Is other DTC present?
3
IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA
• Is DTC P0140 on FREEZE FRAME DATA?
4
VERIFY CURRENT INPUT SIGNAL STATUS
• Warm up engine.
• Access O2S12 for P0140 or O2S22 for P0160
PID using WDS or equivalent.
• Verify PID while racing engine at least 10
times (in NEUTRAL (MTX) or PARK (ATX)).
• Is PID reading okay?
More than 0.55 V at least once during
engine racing.
5
INSPECT INSTALLATION OF REAR HO2S
• Check if rear HO2S is loosely installed.
• Is sensor installed securely?
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to net step.
No
Intermittent concern eists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See
F227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
Yes Go to appropriate DTC troubleshooting procedures.
(See
F67 DTC
TABLE.)
No
Go to net step.
Yes Go to net step.
No
Go to troubleshooting procedures for DTC on FREEZE
FRAME DATA.
(See
F67 DTC
TABLE.)
Yes Go to step 7.
No
Go to net step.
Yes Go to net step.
No
Install sensor securely, then go to Step 9.
ACTION
F115
F