DTC P2195 / P2196
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P2195: O2 Sensor Signal Biased / Stuck Lean (Bank1 Sensor1) Output voltage of HO2S-1 circuit is lower than 0.4 V for 25 sec. even if output voltage of HO2S-2 circuit is higher than 0.6 V. (3 D/C detection logic) |
•HO2S-1 and/or its circuit
•ECM |
|
P2196: O2 Sensor Signal Biased / Stuck Rich (Bank1 Sensor1) Output voltage of HO2S-1 circuit is higher than 0.55 V for 25 sec. even if output voltage of HO2S-2 circuit is lower than 0.25 V. (3 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | HO2S-2 heater power supply circuit | 2. | HO2S-2 |
| A1: | HO2S-1 heater power supply circuit | B2: | HO2S-2 signal circuit | 3. | ECM |
| A2: | HO2S-1 signal circuit | B3: | HO2S-2 ground circuit | 4. | Shield wire |
| A3: | HO2S-1 ground circuit | B4: | HO2S-2 heater drive circuit | ||
| A4: | HO2S-1 heater drive circuit | 1. | HO2S-1 |
DTC Confirmation Procedure
WARNING:
If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.
•Select a level road with no traffic to minimize the risk of accident.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
P2195
NOTE:
•Check that the following conditions are met in this “DTC Confirmation Procedure”.
—A/F feedback (closed loop) control is activated.
—Battery voltage > 11 V
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.—Battery voltage > 11 V
—HO2S-1 heater (P0030, P0031 and P0032)
—EVAP canister purge valve (P0443, P0458 and P0459)
—EVAP canister purge valve (P0443, P0458 and P0459)
1)Warm up engine to normal operating temperature.
2)Drive vehicle at 50 to 80 km/h (31 to 50 mile/h) constantly for 10 min. or more.
P2196
NOTE:
•Check that the following conditions are met in this “DTC Confirmation Procedure”.
—A/F feedback (closed loop) control is activated.
—Battery voltage > 11 V
•Check that the following DTCs are not detected in this “DTC Confirmation Procedure”.—Battery voltage > 11 V
—HO2S-1 heater (P0030, P0031 and P0032)
1)Warm up engine to normal operating temperature.
2)Drive vehicle at 50 to 80 km/h (31 to 50 mile/h) constantly for 10 min. or more.
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
HO2S-1 signal circuit check
1)Check “A2” and “A3” circuits according to Step 3 under DTC P0131 / P0132:K14C.
Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
DTC recheck
1)Replace HO2S-1.
2)Perform “DTC Confirmation Procedure” and check DTC.
Is DTC P2195 or P2196 still detected?
|
Replace ECM and recheck DTC.
|
End.
|