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PACCAR PX-8 CM2150 (2007-09) Fault Code: 241 PID: 84 SPN: 84 FMI: 2 Wheel-Based Vehicle Speed – Data Erratic, Intermittent, or Incorrect. The ECM lost the vehicle speed signal.
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.
There are multiple types of vehicle speed sensors. Various types include magnetic pickup, data link, digital, and tachograph. Refer to the OEM for the specific type installed on the vehicle.
This fault is set active when the ECM loses a vehicle speed signal when other engine conditions indicate the vehicle is moving. The fault can also become active if there is a series of clutch, service brake. or throttle movements with no vehicle movement. The fault is set inactive when the ECM receives a vehicle speed signal greater than zero.
Since the vehicle speed sensor is an OEM installed component, this troubleshooting procedure will not catch all malfunctions of the circuit due to components not under Cummins Inc. control. Sensor resistance values, data link speed sensors, and tachographs are not fully covered under this procedure. For more information on those components, please refer to the OEM troubleshooting and repair manual.
Possible repairs:
1)Repair or replace the OEM harness.
2)Repair or replace the gear or tone wheel.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 239 PID: SID 232 SPN: 3511 FMI: 3 Sensor Supply 3 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at sensor supply number 3 circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 238 PID: SID 232 SPN: 3511 FMI: 4 Sensor Supply 3 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected on the +5 volt sensor supply circuit to the engine speed sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 234 PID: 190 SPN: 190 FMI: 0 Engine Crankshaft Speed/Position – Data Valid but Above Normal Operational Range – Most Severe Level. Engine speed signal indicates engine speed above engine protection limit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 222 PID: 108 SPN: 108 FMI: 4 Barometric Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at barometric pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 221 PID: 108 SPN: 108 FMI: 3 Barometric Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at barometric pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 197 PID: 111 SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operating Range – Moderately Severe Level. Low engine coolant level detected.