Cummins ISB CM850 (2003-06) Fault Code: 433 PID: 102 SPN: 102 FMI: 2 Intake manifold pressure sensor circuit – data incorrect. An error in the intake manifold pressure sensor signal was detected by the ECM.

At key-on, before the engine is started, the readings for intake manifold pressure, barometric pressure, and exhaust pressure are compared. This fault code occurs if the intake manifold pressure sensor reading is different from the other three. This check is only done once after the keyswitch is turned on.

Possible repairs:

1)Replace the intake manifold pressure sensor.