Dtc P0133 Ho2S-1 Circuit Slow Response - Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual

6-74 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)

DTC P0133 HO2S-1 Circuit Slow Response

WIRING DIAGRAM
Refer to DTC P0130.
DTC DETECTING CONDITION AND TROUBLE AREA
DTC DETECTING CONDITION
Following conditions are detected in idle state while running
under driving conditions described for "DTC Confirmation
Procedure".
Hi/Lo cycle (TRANS TIME displayed on scan tool) of HO2S-1
output voltage is longer than specification or response rates
→ →
of Hi Lo and Lo
→
threshold V or L R threshold V on scan tool) are longer
than specification.
(2 driving cycles detection logic)
DTC CCONFIRMATION PROCEDURE
Refer to DTC P0130.
TROUBLESHOOTING
Step
1 Was "Engine Diag. Flow Table" performed?
2 1) Replace HO2S-1 and recheck.
Is DTC P0133 detected?
Hi (TRANS TIME displayed as R
Action
TROUBLE AREA
• HO2S-1
• ECM (PCM)
→
L
Yes
Go to Step 2.
Substitute a known-good
ECM (PCM) and recheck.
No
Go to "Engine Diag. Flow
Table".
HO2S-1 malfunction.