PACCAR PX-8 CM2150 (2007-09) Fault Code: 115 PID: 190 SPN: 612 FMI: 2 Engine Magnetic Speed/Position Lost Both of Two Signals – Data Erratic, Intermittent, or Incorrect. The engine control module (ECM) has detected that the primary and backup speed sensor signals are connected backwards.
Verify the ECM calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM.
This fault code indicates that the camshaft position sensor and crankshaft position sensor wiring harness connectors are reversed.
Possible repairs:
1)If necessary, calibrate the ECM.
2)Replace the ECM.
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