Cummins Fault Code 231: Engine Coolant Pressure Sensor Circuit - shorted high

Code details

Manufacturer

Cummins

Applies to

Cummins QS-series electronic engines

Fault code

231

J1939 SPN

109

FMI

3 — Voltage above normal, or shorted to high source

J1587 PID / SID

P109

Engine models

QSK19, QSK23, QST30

QSK45/60/78 severity level

QSK45: 2 • QSK60: 2 • QSK78: 2

What to do next

• Read active and inactive codes with the OEM service tool and note the occurrence count.
• FMI 3 tells the shop the type of failure to test for: voltage above normal, or shorted to high source.
• Have a heavy-duty diesel technician confirm the fault against the engine or chassis service manual before replacing parts.

Related fault codes

• Cummins Fault Code 232 — Engine Coolant Pressure Sensor Circuit - shorted low
• Cummins Fault Code 233 — Engine Coolant Pressure Low – Warning
• Cummins Fault Code 233 — Engine Coolant Pressure Low – Warning
• International SA 58 SPN 109 FMI 14 — High Refrigerant Pressure
• International Fault Code SPN 109 FMI 0 — Engine Coolant Pressure 1: Data Valid But Above Normal Operational Range – Most Severe Level
• International Fault Code SPN 109 FMI 1 — Engine Coolant Pressure 1: Data Valid But Below Normal Operational Range – Most Severe Level
• International Fault Code SPN 109 FMI 20 — Engine Coolant Pressure 1: Data Drifted High
• International Fault Code SPN 109 FMI 21 — Engine Coolant Pressure 1: Data Drifted Low