PACCAR PX-8 CM2150 (2007-09) Fault Code: 731 PID: SID 064 SPN: 723 FMI: 7 Engine Speed/Position Camshaft and Crankshaft Misalignment – Mechanical System Not Responding Properly or Out of Adjustment.

Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.

The ECM monitors the position of the missing tooth on the crankshaft speed sensor target and the camshaft speed sensor target. If the two positions do not match, the ECM then determines that there is a mechanical misalignment between the two sensors.

This fault code is logged when there is a mechanical misalignment between the crankshaft engine position sensor and the camshaft engine position sensor.

Possible causes:

1)Engine speed sensor rings that are loose or not aligned correctly
2)Mechanical misalignment.

Possible repairs:

1)Replace the position or speed sensor.
2)Replace the tone wheel.
3)Replace, tighten, or clean the ground wires or connections.
4)Remove and install camshaft to properly align timing marks at TDC.
5)Replace the crankshaft assembly if all steps have been completed and checked again.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 698 PID: 21 SPN: 1136 FMI: 4 ECM Internal Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage or an open circuit detected at the internal ECM temperature sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 692 PID: 692 SPN: 1172 FMI: 4 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the turbocharger compressor inlet air temperature sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 691 PID: 351 SPN: 1172 FMI: 3 Turbocharger 1 Compressor Inlet Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the turbocharger compressor inlet air temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 689 PID: 190 SPN: 190 FMI: 2 Engine Crankshaft Speed/Position – Data Erratic, Intermittent, or Incorrect. The ECM has detected an error in crankshaft position sensor signal.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 688 PID: 98 SPN: 98 FMI: 0 Engine Oil Level – Data Valid but Above Normal Operational Range – Most Severe Level. High oil level has been detected by the oil level sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 687 PID: 103 SPN: 103 FMI: 1 Turbocharger 1 Speed – Data Valid But Below Normal Operating Range – Moderately Severe Level. Low turbocharger speed detected by the ECM.
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