The Engine Control Module (ECM) detects one of the following conditions: •The “Soft Vehicle Speed Limit” parameter is programmed to “No” and the vehicle speed exceeds the programmed “Vehicle Speed Limit” by more than 10 MPH for more than 20 seconds.•The “Soft Vehicle Speed Limit” parameter is programmed to “Yes” and the vehicle speed exceeds the programmed “Vehicle Speed Limit” by more than 15 MPH for more than 20 seconds. Probable Causes: 1) ECM Programmed incorrectly2) Speedometer is not reading engine speed correctly CAT 3406E (Prefix 1MM or 2WS) Fault Code: 38 PID: SPN: 105 FMI: 4 Intake Manifold Air...

The Engine Control Module (ECM) detects the following conditions: •A timing calibration has been successfully completed.•The primary engine speed/timing sensor and the secondary engine speed/timing sensor are off by more than three degrees. Probable Causes: 1) Cluster gear is not properly aligned or it has damage2) If cylinder head was removed, backlash for camshaft be out of spec3) Engine speed sensors not installed properly CAT 3406E (Prefix 1MM or 2WS) Fault Code: 41 PID: SPN: 84 FMI: 0 Vehicle Overspeed Warning CAT 3406E (Prefix 1MM or 2WS) Fault Code: 38 PID: SPN: 105 FMI: 4 Intake Manifold Air Temperature voltage...

The Engine Control Module (ECM) detects the following conditions: •A timing calibration has never been performed on a new ECM or the timing is off by more than three degrees. Probable Causes: 1) Speed/timing sensor not calibrated properly (Need CAT software to do this)2) Speed/timing sensor failure3) Speed/timing sensor harness failure CAT 3406E (Prefix 1MM or 2WS) Fault Code: 42 PID: SPN: 22 FMI: 11 Primary to Secondary Engine Speed Signal Calibration CAT 3406E (Prefix 1MM or 2WS) Fault Code: 41 PID: SPN: 84 FMI: 0 Vehicle Overspeed Warning CAT 3406E (Prefix 1MM or 2WS) Fault Code: 38 PID: SPN:...

The Engine Control Module (ECM) detects the following conditions: • Oil pressure drops below factory limits for more than 8 seconds Probable Causes: 1) Low oil level2) Low oil pressure sensor3) Low oil pressure sensor harness4) If codes also active for barometric, atmospheric pressure, or boost pressure, repair those first5) Verify 5V to all pressure sensors6) Manually check engine for oil pressure to verify sensor is performing correctly7) ECM connection/harness CAT 3406E (Prefix 1MM or 2WS) Fault Code: 42 PID: SPN: 22 FMI: 13 Engine Speed Signal Calibration Not Performed CAT 3406E (Prefix 1MM or 2WS) Fault Code: 42 PID:...

The Engine Control Module (ECM) detects the following conditions: • Oil pressure drops below factory limits for more than 8 seconds Probable Causes: 1) Low oil level2) Low oil pressure sensor3) Low oil pressure sensor harness4) If codes also active for barometric, atmospheric pressure, or boost pressure, repair those first5) Verify 5V to all pressure sensors6) Manually check engine for oil pressure to verify sensor is performing correctly7) ECM connection/harness CAT 3406E (Prefix 1MM or 2WS) Fault Code: 46 PID: SPN: 100 FMI: 1 Low Oil Pressure Warning CAT 3406E (Prefix 1MM or 2WS) Fault Code: 42 PID: SPN: 22...