Cummins Fault Code 122: Intake Manifold Pressure Sensor #1 Circuit - shorted high

Code details

Manufacturer

Cummins

Applies to

Cummins QS-series electronic engines

Fault code

122

J1939 SPN

102

FMI

3 — Voltage above normal, or shorted to high source

J1587 PID / SID

P102

Engine models

QSB, QSC, QSL9, QSM11, QSX15, 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 123 — Intake Manifold Pressure Sensor #1 Circuit - shorted low
• Cummins Fault Code 124 — High Intake Manifold Pressure Left Bank
• Cummins Fault Code 125 — Low Intake Manifold Pressure Left Bank
• Cummins Fault Code 433 — Intake Manifold Pressure Sensor Circuit - data incorrect
• PACCAR Fault Code P0069 — Inlet Air Pressure in Inlet Manifold – Data Erratic, Intermittent or Incorrect, at Ignition ON
• PACCAR Fault Code P0107 — Inlet Air Pressure in Inlet Manifold – Voltage Too Low or Short Circuit to Ground on ECU (D420) Pin (A51)
• PACCAR Fault Code P0108 — Inlet Air Pressure in Inlet Manifold – Voltage Too High or Short Circuit to Supply on ECU (D420) Pin (A51)
• PACCAR Fault Code P104B — Inlet Air Pressure in Inlet Manifold – Data Valid But Too High