Dtc P0131 / P0132: O2 Sensor Circuit Low Voltage / High Voltage (Sensor-1, Bank-1) - Suzuki 2006 SX4 Service Manual

1A-74 Engine General Information and Diagnosis:

DTC P0131 / P0132: O2 Sensor Circuit Low Voltage / High Voltage (Sensor-1, Bank-1)

Wiring Diagram
Refer to "DTC P0030: HO2S Heater Control Circuit (Sensor-1, Bank-1)".
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P0131:
A/F sensor terminal voltage is lower than 1.8 V or A/F sensor output
current is lower than –5 mA for 5 sec. with engine running.
(2 driving cycle detection logic)
DTC P0132:
A/F sensor terminal voltage is higher than 3.8 V or A/F sensor output
current is higher than 5 mA for 5 sec. with engine running.
(2 driving cycle detection logic)
DTC Confirmation Procedure
NOTE
Check to make sure that the following conditions are satisfied when using this "DTC Confirmation
Procedure".
• The following DTCs are not detected: DTCs related to A/F sensor heater
1) With ignition switch OFF, connect scan tool to DLC.
2) Turn ON ignition switch and clear DTC.
3) Start engine and warm up to normal operating temperature.
4) Run engine at idle speed for 1 min. or more.
5) Check DTC and pending DTC.
DTC Troubleshooting
Step
1 Was "Engine and Emission Control System Check"
performed?
2 Is there DTC(s) other than A/F sensor?
3 A/F sensor signal check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Warm up engine to normal operating temperature and
keep it at 2000 r/min. for 60 sec.
3) Repeat racing engine (Repeat depressing accelerator
pedal 5 to 6 times continuously to enrich A/F mixture and
take foot off from pedal to enlean it).
Does A/F sensor output current between –0.2 mA and 0.2
mA?
Action
Trouble area
• A/F sensor and/or its circuit
• ECM
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
S6RW0C1104026
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
Go to Step 4.