CAT 3406E (Prefix 1MM or 2WS) Fault Code: 42 PID: SPN: 22 FMI: 11 Primary to Secondary Engine Speed Signal Calibration
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 damage
2) If cylinder head was removed, backlash for camshaft be out of spec
3) Engine speed sensors not installed properly
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![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://i0.wp.com/www.ecuforcetruck.com/wp-content/uploads/2023/09/1.png?resize=300%2C300&ssl=1)
![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://www.ecuforcetruck.com/wp-content/uploads/2023/09/2.png)
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