Dtc P0133 Ho2S-1 (Bank 1) Circuit Slow Response - Suzuki GRAND VITARA XL-7 Owner's Manual

6-1-60 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H27 ENGINE)
Step
4 Short term fuel trim check :
1) Run engine at 2000 r/min. for 60 sec.
2) With engine idling, check short term fuel trim displayed
on scan tool.
Is it within – 20 to +20 %?
Fig. for Step 2
1. Normal
2. NG

DTC P0133 HO2S-1 (Bank 1) Circuit Slow Response

WIRING DIAGRAM/CIRCUIT DESCRIPTION
Refer to DTC P0130.
DTC DETECTING CONDITION AND TROUBLE AREA
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 → Hi
(TRANS TIME displayed as R → L threshold V or L → R threshold V on scan
tool) are longer than specification.
(2 driving cycle detection logic)
DTC CONFIRMATION PROCEDURE
Refer to DTC P0130.
TROUBLESHOOTING
Step
1 Was "ENGINE DIAG. FLOW TABLE" per-
formed?
2 1) Replace HO2S-1 and recheck.
Is DTC P0133 detected?
Action
DTC DETECTING CONDITION
Action
Yes
Intermittent trouble
or faulty ECM
(PCM).
Check for intermit-
tent referring to
"INTERMITTENT
AND POOR CON-
NECTION" in Sec-
tion 0A.
HO2S-1
ECM (PCM)
Yes
Go to Step 2.
Substitute a known-good
ECM (PCM) and recheck.
No
Go to DTC P0171/
P0172 Diag. Flow
Table.
TROUBLE AREA
No
Go to "ENGINE DIAG.
FLOW TABLE" in this
section.
HO2S-1 malfunction.