Dtc P0137 / P0138: O2 Sensor (Ho2S) Circuit Low Voltage / High Voltage (Sensor-2) - Suzuki Grand Vitara 2011 Manual

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1A-113 Engine General Information and Diagnosis: For Petrol Engine Model
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting: For Petrol Engine Model".
Step
1
Was "Engine and Emission Control System Check"
performed?
2
DTC check
Is there DTC(s) other than P0133?
3
Intake system and exhaust system for leakage check
Are intake system and exhaust system in good condition?

DTC P0137 / P0138: O2 Sensor (HO2S) Circuit Low Voltage / High Voltage (Sensor-2)

Wiring Diagram
BLK/WHT
*GRN
5
4
3
15
14
13
12
11
30
29
28
27
26
44
45
43
42
41
60
59
58
57
56
1. HO2S heater relay
2. Shield wire
3. Ignition switch
Action
BLK
PNK
1
BLK
8
PNK
7
WHT
E23
10
9
8
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
4. "O2 HTR" fuse
5. "IG COIL" fuse
6. HO2S-2
Go to Step 2.
Go to applicable DTC
diagnosis flow.
Replace A/F sensor.
6
BLK
2
BLU
RED
GRN
10
2
1
15
14
13
12
11
17
16
30
29
28
27
26
44
32 31
45
43
42
41
47 46
60
59
58
57
56
7. Heater
8. To A/F sensor heater
9. ECM
Yes
Go to "Engine and
Emission Control
System Check: For
Petrol Engine Model".
Go to Step 3.
Repair or replace
defective leakage parts.
9
BLK/RED
C37-47
5V
C37-11
GRY/GRN
C37-57
C37
10
9
8
7
6
5
4
3
25
24
23
22
21
20
19
18
40
39 38
37
36
35
34
33
55
54 53
52
51
50
49
48
10. To other sensors
*: For M16 engine
No
S6JB0A1114034
2
1
17
16
32 31
47 46
I5JB0A110045-01
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