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DIAGNOSTIC CODES
COMPONENT CONDITION SPN FMI
Voltage Below
Normal, Or Shorted
To Low Source
4
Current Below Normal
Or Open Circuit
5
PTO Solenoid Driver
Circuit
Voltage Above
Normal, Or Shorted
To High Source
1888
3
Voltage Below
Normal, Or Shorted
To Low Source
4
Current Below Normal
Or Open Circuit
5
Vehicle Speed
Data Valid But Above
Normal Operating
Range - Moderately
Severe Level
2590
16
Oxygen Sensor Bank
1 Sensor 1
Data Erratic,
Intermittent Or
Incorrect
3056
2
Voltage Above
Normal, Or Shorted
To High Source
3
Voltage Below
Normal, Or Shorted
To Low Source
4
Bad Intelligent Device
Or Component
12
Data Valid But Below
Normal Operating
Range - Least Severe
Level
17
Oxygen Sensor Bank
1 Sensor 2
Data Erratic,
Intermittent Or
Incorrect
3057
2
Voltage Above
Normal, Or Shorted
To High Source
3
Voltage Below
Normal, Or Shorted
To Low Source
4
194
TROUBLESHOOTING
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