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Cummins ISL CM850 (2003-06) Fault Code: 124 PID: 102 SPN: FMI: 0 Intake Manifold 1 Pressure Sensor Circuit – Data Valid But Above Normal Operating Range – Moderately Severe Level. Intake manifold pressure has exceeded the maximum limit for the given engine rating.

Cummins ISL CM850 (2003-06) Fault Code: 124 PID: 102 SPN: FMI: 0 Intake Manifold 1 Pressure Sensor Circuit – Data Valid But Above Normal Operating Range – Moderately Severe Level. Intake manifold pressure has exceeded the maximum limit for the given engine rating.

This fault code become active when the intake manifold pressure exceeds the maximum pressure limit for a given engine rating.

Possible causes:

1)Malfunctioning turbocharger wastegate
2)Wastegate tampering
3)Wrong turbocharger part
4)Possible tampering of the fuel system or turbocharger system.

The sensor return configuration for Euro 4 ISL engines has been changed for automotive wiring harnesses manufactured from February 2012 onward. The new style wiring harnesses can be be identified using the method below:

1)Disconnect the ECM connector
2)Disconnect the camshaft position sensor
3)Disconnect the intake manifold pressure/temperature sensor
4)Check for continuity between the intake manifold pressure/temperature sensor RETURN pin and the camshaft position sensor RETURN pin
5)Check for continuity between ECM pin 47 and the camshaft position sensor RETURN pin
6)Use the table below to determine which harness is fitted to the engine.

NOTE: QSB engines, all C series engines, and all L series engines are not affected by this change.

Possible repairs:

1)Replace the intake manifold pressure sensor