Dtc "C44" (P0156) Or "C64" (P0130): O2 Sensor (O2S) Circuit Malfunction (For - Suzuki VLR1800 Service Manual

1A-87 Engine General Information and Diagnosis:
DTC "C44" (P0156) or "C64" (P0130): O2 Sensor (O2S) Circuit Malfunction (For E-02, 19, 24, 33)
Detected Condition and Possible Cause
Detected Condition
C44/C64 O2 sensor output voltage is not input to
ECM during engine operation and running
P0156/P0130 condition.
Sensor voltage < 1.0 V
Wiring Diagram
O2 sensor #1
(Rear)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 18 18
O2 sensor #2
(Front)
ECM coupler (Harness side)
24 25 26 27 28 29 30 31 32 33 34
Possible Cause
• O2 sensor circuit open or shorted to ground.
• Fuel system malfunction.
• ECM malfunction.
12
W/G
W/Bl
15
B/Br
29
35 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
52 52 52 53 54 55 56 57 58 59 60 61 62 63
B822H11104026
ECM
O2S. #1
O2S. #2
E2
I822H1110096-03
64 65 66 67 68 68 68
I822H1110010-01