HYDRAULIC ARRANGEMENT 8K5553 - Caterpillar

Which Generate This Code:The Electronic Control Module (ECM) will log a diagnostic code if the ECM detects all of the following conditions:
The engine speed is greater than 0 rpm.
The pattern for the timing ring is incorrect for five seconds.Note: If The pattern for the timing ring is correct again for five seconds the diagnostic code deactivates.System Response:The ECM will log the diagnostic code. If a valid signal is not received from the primary engine speed/timing sensor, the ECM will default to the secondary engine speed/timing sensor.
Engine misfires
Engine shutdownNote: The engine will shut down only if the signals from the primary engine speed/timing sensor and from the secondary engine speed/timing sensor are abnormal.Test Step 1. Perform the following diagnostic procedure: Engine Speed/Timing Sensor Circuit - TestResults:
OK - STOP