ECFG Superstore › Cummins fault codes › 7154

Cummins fault code7154 · Engine Control Module Circuit

Engine Control Module Circuit - Voltage Above Normal or Shorted to High Source

Fault code7154 Cummins fault code as shown in INSITE / CaltermSPN629 · Engine Control Module Critical Internal FailureFMI3 Voltage above normal, or shorted to high sourceOBD codenone (J1939 only)LampAmber WARNING lampCummins textEngine Control Module Circuit - Voltage Above Normal or Shorted to High SourceFailure modeVoltage Above Normal or Shorted to High Source

What Cummins code 7154 means

The signal wire for Engine Control Module Circuit is sitting above the voltage window the ECM expects. In practice that is usually an open signal or return wire (the ECM pull-up takes the input high), a short to the 5 V supply or battery, or a failed sensor element.

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 629 FMI 3 rather than as Cummins code 7154. Cummins INSITE and Calterm show the Cummins number, the SPN / FMI pair and the lamp together.

Fix the file: delete code 7154 from your calibration

from $150

Custom DTC delete, up to 30 codes, $150. Full DPF / EGR / SCR delete with all related codes and derates, $500. Upload your Calterm .xcal, tick the services, pay with PayPal, and the finished file comes back by email and WhatsApp.

Upload your .xcal →

ECFG definition files for your ECM

1,800 files

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.

Find your ECFG →

Other Cummins codes on SPN 629 Engine Control Module Critical Internal Failure

19 other fault codes share this SPN; each one is a different failure mode (FMI) of the same component.

111 FMI 12 · P0606 333 FMI 12 335 FMI 12 343 FMI 12 · P0607 375 FMI 2 · P0602 525 FMI 3 1116 FMI 12 1388 FMI 12 1417 FMI 12 1597 FMI 12 2661 FMI 31 2662 FMI 31 2768 FMI 9 2994 FMI 14 3549 FMI 7 6155 FMI 11 7155 FMI 4 7156 FMI 14 17226 FMI 22

All codes grouped by SPN →

Related Cummins fault codes

7149 · SPN 1231 FMI 13J1939 Network #2 7151 · SPN 1235 FMI 13J1939 Network #3 7152 · SPN 3249 FMI 3Aftertreatment Exhaust Temperature 2 Sensor Circuit 7153 · SPN 3249 FMI 4Aftertreatment Exhaust Temperature 2 Sensor Circuit 7155 · SPN 629 FMI 4Engine Control Module Circuit 7156 · SPN 629 FMI 14Engine Control Module Spark Supply Voltage 7157 · SPN 3241 FMI 18Aftertreatment Exhaust Temperature 1 7158 · SPN 1393 FMI 3Engine Cylinder 1 Ignition Transformer Secondary Output

J1939 failure mode identifiers (FMI)

FMI 3 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 7154

What does Cummins fault code 7154 mean?

Cummins 7154 is "Engine Control Module Circuit - Voltage Above Normal or Shorted to High Source". It maps to SPN 629 FMI 3. The signal wire for Engine Control Module Circuit is sitting above the voltage window the ECM expects. In practice that is usually an open signal or return wire (the ECM pull-up takes the input high), a short to the 5 V supply or battery, or a failed sensor

Which lamp does fault code 7154 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 7154?

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 7154 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.

← All Cummins fault codes · XCAL file service · ECFG Superstore