6.2 Diagnostic Codes

NOTICE

For specific SPNs Refer to the Appropriate Troubleshooting Manual for that Engine Platform, i.e. DD Platform, Series 60, and MBE.

This section supports the Aftertreatment System (ATS) fault codes recorded during DDEC VI engine operation. A Suspect Parameter Number (SPN) is generated when a condition exists that prevents the ATS from operating at peak efficiency. The codes can be for engine protection or performance.

Per SAE standards, the Suspect Parameter Number (SPN) and Failure Mode Identifier (FMI) define what kind of failure occurred.

6.2.1 SHUTDOWN-ENGINE PROTECTION FAULT CODE

A shutdown-engine protection SPN is activated when an engine operating condition exists that can cause immediate damage to the engine. The engine should be shut down until the condition is corrected to prevent additional damage.

6.2.2 DERATE-ENGINE PROTECTION FAULT CODE

A derate-engine protection SPN is activated when an engine operating condition exists that can cause engine damage if left unattended. When the engine slowly loses power, the operator knows to correct the condition to prevent additional damage. However; if damage is not imminent, the operator can override the shutdown and slowly proceed (limp) to a service center to safely correct the problem. All codes for the ATS are derate engine protection codes as listed in Table "Aftertreatment System Codes (1 of 3)" , Table "Aftertreatment System Codes (2 of 3)" , and Table "Aftertreatment System Codes (3 of 3)" .

SPN Code Number	FMI	Code Description
51	2	Intake Throttle Position Deviation Error
51	3	Intake Air Throttle Circuit Failed High
51	4	Intake Air Throttle Circuit Failed Low
94	3	Fuel Compensation Pressure Sensor Circuit Failed High
94	4	Fuel Compensation Pressure Sensor Circuit Failed Low
1037	0	DPF HC Absorption Very High
1037	16	DPF HC Absorption High
3242	2	DOC Inlet Temperature Sensor Plausibility Error
3242	3	DOC Inlet Temperature Circuit Failed High
3242	4	DOC Inlet Temperature Circuit Failed Low
3242	8	DOC Inlet Temperature Signal Spike
3242	10	DOC Inlet Temperature Sensor Stuck

Table , Aftertreatment System Codes (1 of 3)

SPN Code Number	FMI	Code Description
3246	0	DPF Outlet Temperature Very High
3246	2	DPF Outlet Sensor General Temperature Plausibility
3246	3	DPF Outlet Temperature Circuit Failed High
3246	4	DPF Outlet Temperature Circuit Failed Low
3246	10	DPF Outlet Temperature Sensor Stuck
3246	14	Abnormal DPF Temperature Rise
3246	16	DPF Outlet Temperature High
3250	0	DOC Outlet Temperature Too High
3250	2	DOC Outlet Temperature Sensor Plausibility Error
3250	3	DOC Outlet Temperature Circuit Failed High
3250	4	DOC Outlet Temperature Circuit Failed Low
3250	8	DOC Outlet Temperature Signal Spike
3250	10	DOC Outlet Temperature Sensor Stuck
3250	14	Abnormal DOC Temperature Rise (2)
3250	31	Abnormal DOC Temperature Rise (1)
3251	0	DPF Pressure Out of Range Very High
3251	1	DPF Pressure Out of Range Low
3251	16	DPF Pressure Out of Range High
3464	14	Intake Air Throttle Control Circuit Electrical Fault
3471	1	Electronic Dosing Valve Failed Self Test
3471	3	Electronic Dosing Valve Circuit Failed High
3471	4	Electronic Dosing Valve Circuit Failed Low
3471	5	Electronic Dosing Valve Circuit Failed Open
3480	1	Doser Fuel Line Pressure Low
3480	2	Doser Fuel Line Pressure Abnormal
3480	14	Doser Fuel Line Pressure Sensor Failed Self Test
3480	16	Doser Fuel Line Pressure High
3480	31	Fuel Cutoff Valve Failed Self Test
3482	3	Fuel Cutoff Valve Circuit Failed High
3482	4	Fuel Cutoff Valve Circuit Failed Low
3482	5	Fuel Cutoff Valve Circuit Open
3482	7	Fuel Cutoff Valve Failed Self Test
3556	0	Regen Temperature Out of Range High
3556	1	Regen Temperature Out of Range Low

Table , Aftertreatment System Codes (2 of 3)

SPN Code Number	FMI	Code Description
3609	2	DPF Inlet Pressure Sensor Drifted High in Range Fault (High Box)
3609	3	DPF Inlet Pressure Circuit Failed High
3609	4	DPF Inlet Pressure Circuit Failed Low
3609	8	DPF Outlet Temperature Signal Spike
3609	10	DPF Inlet Pressure Sensor Stuck
3609	20	DPF Inlet Pressure Sensor Drifted High in Range Fault (Low Box)
3609	21	DPF Inlet Pressure Sensor Drifted Low in Range Fault (Low Box)
3610	2	DPF Pressure Sensors Plausibility Error
3610	3	DPF Outlet Pressure Circuit Failed High
3610	4	DPF Outlet Pressure Circuit Failed Low
3610	10	DPF Outlet Pressure Sensor Stuck
3610	14	DPF Outlet Pressure Sensor Drifted High in Range Fault (High Box)
3610	20	DPF Outlet Pressure Sensor Drifted High in Range Fault (Low Box)
3719	0	Soot Level Very High
3719	15	DPF Zone 3 Condition
3719	16	Soot Level High
3719	31	DPF Zone 2 Condition
3720	15	DPF Ash Clean Request
3720	16	DPF Ash Clean Request – Derate
4077	0	Doser Fuel Line Pressure High
4077	1	Doser Fuel Line Pressure Abnormal
4077	3	Fuel Line Pressure Sensor Circuit Failed High
4077	4	Fuel Line Pressure Sensor Circuit Failed Low
4077	14	Doser Fuel Line Pressure Failed Self Test

Table , Aftertreatment System Codes (3 of 3)

6.2.3 PERFORMANCE FAULT CODES

A performance fault code is activated when specific conditions occur within a given amount of time that the calibration determines is not “normal”.