Cummins ISX CM870 (2003-06) Fault Code: 433 PID: P102 SPN: 102 FMI: 2/2 Intake Manifold Pressure Sensor Circuit – Data Incorrect. An error in the intake manifold pressure signal was detected by the ECM.
At key-on, before the engine starts, the sensor readings for barometric pressure, exhaust gas pressure, and engine oil pressure are compared with the intake manifold pressure. This fault code occurs if the intake manifold pressure sensor reading is different from any two of the other three. This check is only done once after the keyswitch is turned on and before the engine is started. The engine oil temperature must also be at least 7?C [45?F] for the check to run.
Shop exhaust fans can cause his fault code to come active. Turn exhaust fans off when troubleshooting this fault code.
Possible repairs:
1)Replace the intake manifold pressure sensor.
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