Cummins Fault Code 233: Engine Coolant Pressure Low – Warning

Code details

Manufacturer

Cummins

Applies to

Cummins QS-series electronic engines

Fault code

233

J1939 SPN

109

FMI

1 — Data valid but below normal operating range (most severe)

J1587 PID / SID

P109

Engine models

QSK19, QSK23

QSK45/60/78 severity level

QSK45: 1 • QSK60: 1 • QSK78: 1

What to do next

• Read active and inactive codes with the OEM service tool and note the occurrence count.
• FMI 1 tells the shop the type of failure to test for: data valid but below normal operating range (most severe).
• 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 233 — Engine Coolant Pressure Low – Warning
• Cummins Fault Code 231 — Engine Coolant Pressure Sensor Circuit - shorted high
• Cummins Fault Code 232 — Engine Coolant Pressure Sensor Circuit - shorted low
• 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