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Cummins fault code12469 · Sensor Supply 1 Circuit for Dual Leg Aftertreatment

Sensor Supply 1 Circuit for Dual Leg Aftertreatment

Fault code12469 Cummins fault code as shown in INSITE / CaltermSPN520288 · Sensor Supply 1 Circuit for Dual Leg AftertreatmentFMI4 Voltage below normal, or shorted to low sourceOBD codenone (J1939 only)LampAmber WARNING lampCummins textSensor Supply 1 Circuit for Dual Leg AftertreatmentFailure modeVoltage below normal, or shorted to low source

What Cummins code 12469 means

The signal wire for Sensor Supply 1 Circuit for Dual Leg Aftertreatment is sitting below the voltage window the ECM expects. In practice that is usually a short to ground, a short to the sensor return, a failed sensor, or a missing 5 V supply.

It lights the amber CHECK ENGINE (warning) lamp. The engine keeps running, but a torque or speed derate may apply depending on the calibration and on how long the fault stays active.

On a generic J1939 scan tool, or on the dash of a Freightliner, Kenworth, Peterbilt, International or Volvo chassis, the same fault is shown as SPN 520288 FMI 4 rather than as Cummins code 12469. Cummins INSITE and Calterm show the Cummins number, the SPN / FMI pair and the lamp together.

This is an emissions-system code. If the component it refers to has been removed or unplugged (DPF, EGR, SCR / DEF or NOx sensor delete) the code will keep returning and the derate with it, however many times it is cleared, because the diagnostic is still enabled in the calibration. The lasting fix in that case is to disable the fault in the .xcal itself.

Fix the file: delete code 12469 from your calibration

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ECFG definition files for your ECM

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Cummins ECFG / E2M definitions for CM550, CM552, CM554, CM570, CM800, CM850, CM870, CM871 and more: the fault table, torque, fuelling, boost, EGR, DPF and SCR maps, ready for Calterm or WinOLS. Instant download.

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Other Cummins codes on SPN 520288 Sensor Supply 1 Circuit for Dual Leg Aftertreatment

Code 12469 is the only Cummins fault code assigned to SPN 520288.

All codes grouped by SPN →

Related Cummins fault codes

12465 · SPN 520284 FMI 3Aftertreatment Diesel Exhaust Fluid Dosing Unit Relay 12466 · SPN 520285 FMI 14J1939 Network #2 for Dual Leg Aftertreatment 12467 · SPN 520286 FMI 2Injector Power Supply for Dual Leg Aftertreatment 12468 · SPN 520287 FMI 3Sensor Supply 1 Circuit for Dual Leg Aftertreatment 12471 · SPN 520289 FMI 3Sensor Supply 5 Circuit for Dual Leg Aftertreatment 12472 · SPN 520317 FMI 4Sensor Supply 5 Circuit for Dual Leg Aftertreatment 12473 · SPN 520336 FMI 12Electronic Calibration Code Incompatibility for Dual Leg 12474 · SPN 521252 FMI 2Real Time Clock for Dual Leg Aftertreatment

J1939 failure mode identifiers (FMI)

FMI 4 is highlighted. The FMI is the second half of every J1939 fault and tells you how the component failed; the SPN tells you which component.

FMI	Meaning (SAE J1939-73)
0	Data valid but above normal operational range - most severe level
1	Data valid but below normal operational range - most severe level
2	Data erratic, intermittent or incorrect
3	Voltage above normal, or shorted to high source
4	Voltage below normal, or shorted to low source
5	Current below normal or open circuit
6	Current above normal or grounded circuit
7	Mechanical system not responding or out of adjustment
8	Abnormal frequency, pulse width or period
9	Abnormal update rate
10	Abnormal rate of change
11	Root cause not known
12	Bad intelligent device or component
13	Out of calibration
14	Special instructions
15	Data valid but above normal operating range - least severe level
16	Data valid but above normal operating range - moderately severe level
17	Data valid but below normal operating range - least severe level
18	Data valid but below normal operating range - moderately severe level
19	Received network data in error
20	Data drifted high
21	Data drifted low
22	Reserved for SAE assignment
23	Reserved for SAE assignment
24	Reserved for SAE assignment
25	Reserved for SAE assignment
26	Reserved for SAE assignment
27	Reserved for SAE assignment
28	Reserved for SAE assignment
29	Reserved for SAE assignment
30	Reserved for SAE assignment
31	Condition exists

Questions about code 12469

What does Cummins fault code 12469 mean?

Cummins 12469 is "Sensor Supply 1 Circuit for Dual Leg Aftertreatment". It maps to SPN 520288 FMI 4. The signal wire for Sensor Supply 1 Circuit for Dual Leg Aftertreatment is sitting below the voltage window the ECM expects. In practice that is usually a short to ground, a short to the sensor return, a failed sensor, or a missing 5 V supply.

Which lamp does fault code 12469 turn on?

Amber WARNING lamp: It lights the amber CHECK ENGINE (warning) lamp. The engine keeps running, but a torque or speed derate may apply depending on the calibration and on how long the fault stays active.

How do I clear or permanently delete Cummins code 12469?

An active code goes inactive on its own once the condition is gone; the inactive record stays in the ECM fault history until it is cleared with Cummins INSITE (or a J1939 tool that supports the DM3 / DM11 clear). If the code keeps coming back because the part is gone, disconnected or not worth repairing, the lasting fix is to disable fault 12469 in the calibration: upload your .xcal to the ECFG Superstore file service, custom DTC delete from $150 (up to 30 codes), full DPF / EGR / SCR delete $500, and flash the returned file with Calterm or INSITE.

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