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6-74 ENGINE GENERAL INFORMATION AND DIAGNOSIS
DTC P0141 HEATED OXYGEN SENSOR (HO2S) HEATER CIRCUIT MALFUNC-
TION (SENSOR-2)
WIRING DIAGRAM / CIRCUIT DESCRIPTION
DTC DETECTING CONDITION
DTC will set when any one of the following conditions is
met.
• Low voltage at terminal C41-4 for specified time after
engine start or while engine running at high load.
• High voltage at terminal C41-4 while engine running
under other than above condition.
✱2 driving cycle detection logic, continuous monitoring.
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF once and then ON.
2) Clear DTC, start engine and warm up engine to normal operating temperature.
3) Keep it at 2000 r/min for 2 min.
4) Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.
BLK/WHT
PNK/BLU
C42 (31P)
9
8
7
6
5
4
3
2
1
21
20
19
18
17
16
15
14
13
12
11
10
31
30
29
28 27
26
25
24
23
22
IG1
C41 (24P)
G02 (17P)
7
6
5
4
3
2
1
6
5
12
11
16
15
14
13 12
11
10
9
8
24
23
22
21
20
19
18
17
17
16
POSSIBLE CAUSE
• HO2S-2 heater circuit open or shorted to ground
• ECM malfunction
ECM
C41-4
4
3
2
1
10
9
8
7
15
14
13
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