Cummins Fault Code 234: Engine Speed High – Critical

Code details

Manufacturer

Cummins

Applies to

Cummins QS-series electronic engines

Fault code

234

J1939 SPN

190

FMI

0 — Data valid but above normal operating range (most severe)

J1587 PID / SID

P190

Engine models

QSB, QSC, QSL9, QSM11, QSX15, QSK19, QSK23, QST30

QSK45/60/78 severity level

QSK45: 3 • QSK60: 3 • QSK78: 3

What to do next

• Treat this as a stop-level fault: shut down safely and get the truck checked before running it further.
• Read active and inactive codes with the OEM service tool and note the occurrence count.
• FMI 0 tells the shop the type of failure to test for: data valid but above 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 115 — Engine Speed/Position Sensor Circuit - lost both of two signals from the magnetic pickup sensor
• Cummins Fault Code 121 — Engine Speed/Position Sensor Circuit - lost one of two signals from the magnetic pickup sensor
• PACCAR Fault Code P0017 — Crankshaft Speed Signal – Not Corresponding With Engine Position
• PACCAR Fault Code P0219 — Engine Speed – Data Valid But Too High
• PACCAR Fault Code P0335 — Crankshaft Speed Signal – Disturbed or No Signal During Engine Operation
• PACCAR Fault Code P1335 — Crankshaft Speed Signal – Disturbed or NO Signal During Engine Start
• PACCAR Fault Code P1336 — Crankshaft Speed Signal – Out of Range During Engine Start
• International Fault Code SPN 190 FMI 0 — Engine Overspeed – Most Severe Level