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Trouble Codes
A feature of the ZPP 416 ECM is that DTC's (Diagnostic Trouble Codes) can be displayed to a technician to indicate
what historic faults are present without requiring the use of a personal computer. The DTC's can be flashed over the
MIL output while the RS232 serial receive input (PC RX) is grounded. This input may be grounded at the diagnostic
connector (pin A-brown/white wire). This connector is located behind the intake manifold near the front cylinder.
Once the ECM recognizes that the user is requesting flash codes, ignition key on-engine off, it will flash or blink a
leader code (111) x 3 times in a row. If the machine has been shut down due to a full waste tank you will also
observe flash code 552 (DTC1552) and 554 (DTC1554). After the leader code has been flashed for 3 times, the first
flash code in the active faults category will be flashed at the same rate. This will repeat depending on the number
of faults retained in memory. Once all faults have been flashed the leader flash code (111) will be repeated. The
codes are retained in memory. Once any issue is resolved and the machine started-run-stopped for 3 times without
a fault detected the light will go out on the 4th start. If an issue has not been resolved the light will remain on and
another code stored in history.
History faults will clear automatically after 20 start-run-stop cycles if the fault has not been detected.
DTC/
#
Pcode
Leader/Trailer Code
CRANK or CAM could not synchronize during
1
P0016
start
2
P0091
Fuel Pressure low voltage
3
P0092
Fuel Pressure high voltage
4
P0107
MAP Signal open or shorted to ground
5
P0108
MAP signal shorted high
6
P0112
IAT signal Low/Shorted to GND
7
P0113
IAT signal High/Open
8
P0116
ECT higher than warning threshold
9
P0117
ECT Sensor Low/Shorted Input
10
P0118
ECT Sensor High/Open Input
11
P0121
TPS1 voltage lower than TPS2 voltage
12
P0122
Throttle Position Signal 1 low voltage
13
P0123
Throttle Position Signal 1 high voltage
14
P0134
Pre-Cat O2 Signal No Activity
15
P0154
Post-Cat O2 Signal No Activity
16
P0171
Gasoline bank 1 A/F is lean (adaptive learn)
17
P0172
Gasoline bank 1 A/F is rich (adaptive learn)
18
P0182
Gasoline Fuel Temp Low Voltage
19
P0183
Gasoline Fuel Temp High Voltage
22
P0217
ECT higher than engine shutdown threshold
23
P0219
Engine Over speed Condition
24
P0221
TPS1 voltage higher than TPS2 voltage
25
P0222
Throttle Position Signal 2 low voltage
Fault Description
86352170 EVEREST
CAN
CAN
Turns on
SPN
FMI
MIL?
636
8
Yes
94
4
Yes
94
3
Yes
106
4
Yes
106
16
Yes
105
4
Yes
105
3
Yes
110
15
Yes
110
4
Yes
110
3
Yes
51
1
Yes
51
4
Yes
51
3
Yes
724
10
Yes
520208
10
Yes
520200
0
Yes
520200
1
Yes
174
4
Yes
174
3
Yes
110
0
Yes
515
15
Yes
51
0
Yes
520251
4
Yes
Operations
MIL Flash
Code
111
216
291
292
127
128
112
113
116
117
118
121
122
123
134
154
171
172
182
183
217
219
221
222
21
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