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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level.

Verify that 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, calibrate the ECM.

This diagnostic checks the reading of the differential pressure sensor when the EGR valve is closed. Since the EGR valve is closed, the reading of the EGR differential pressure should be 0. If the ECM detects a reading higher than expected with the EGR valve closed, this fault code is logged.

Possible causes:

1)A damaged EGR differential pressure sensor
2)A stuck open EGR valve
3)EGR differential pressure sensor flow port cross-drillings are plugged with soot.

Possible repairs:

1)Clean the EGR differential pressure sensor flow ports.
2)Replace the EGR valve.
3)Repair or replace the engine harness.
4)Replace the ECM.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Motor terminal or motor coil short circuit to ground or power supply has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2349 PID: SID 146 SPN: 2791 FMI: 5 EGR Valve Control Circuit – Current Below Normal or Open Circuit. Motor terminal or motor coil open circuit has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2347 PID: SPN: 2790 FMI: 0 Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger compressor outlet air temperature has been calculated by the electronic control module (ECM).
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2346 PID: SPN: 2789 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2345 PID: 103 SPN: 103 FMI: 10 Turbocharger 1 Speed – Abnormal Rate of Change. The turbocharger speed sensor has detected an erroneous speed value.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.

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.

Possible causes:

1)A short circuit to ground in the engine harness, connectors, or engine brake solenoids.

Possible repairs:

1)Repair or replace the engine brake harness.
2)Repair or replace the engine harness.
3)Replace the engine brake solenoid.
4)Replace the ECM.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Motor terminal or motor coil short circuit to ground or power supply has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2349 PID: SID 146 SPN: 2791 FMI: 5 EGR Valve Control Circuit – Current Below Normal or Open Circuit. Motor terminal or motor coil open circuit has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2347 PID: SPN: 2790 FMI: 0 Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger compressor outlet air temperature has been calculated by the electronic control module (ECM).
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2346 PID: SPN: 2789 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source.

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.

Possible causes:

1)Open circuit in the engine harness, brake harness, or engine brake solenoids
2)Short to voltage source in the engine harness
3)Damaged ECM.

Possible repairs:

1)Replace the engine brake solenoid.
2)Replace the ECM.
3)Repair or replace the engine harness.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Motor terminal or motor coil short circuit to ground or power supply has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2349 PID: SID 146 SPN: 2791 FMI: 5 EGR Valve Control Circuit – Current Below Normal or Open Circuit. Motor terminal or motor coil open circuit has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2347 PID: SPN: 2790 FMI: 0 Turbocharger Compressor Outlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger compressor outlet air temperature has been calculated by the electronic control module (ECM).

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.

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 exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active.

Possible causes:

1)An open return circuit in the engine harness, connectors, or sensor
2)A signal wire shorted to sensor supply or battery voltage.

Possible repairs:

1)Replace the exhaust gas pressure sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Motor terminal or motor coil short circuit to ground or power supply has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2349 PID: SID 146 SPN: 2791 FMI: 5 EGR Valve Control Circuit – Current Below Normal or Open Circuit. Motor terminal or motor coil open circuit has been detected by the ECM.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2374 PID: 131 SPN: 1209 FMI: 4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.

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 exhaust gas pressure sensor shares supply and return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active.

Possible causes:

1)A signal circuit open or shorted to ground in the engine harness or sensor
2)A supply wire open or shorted to ground.

Possible repairs:

1)Replace the exhaust gas pressure sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2351 PID: SID 146 SPN: 2791 FMI: 4 EGR Valve Control Circuit – Voltage Below Normal or Shorted to Low Source. Motor terminal or motor coil short circuit to ground or power supply has been detected by the ECM.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2375 PID: 412 SPN: 412 FMI: 3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.

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. If necessary, recalibrate the ECM.

The EGR temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active.

Possible causes:

1)An open return circuit in the harness, connectors or sensor
2)An open signal circuit or shorted to a voltage source.

Possible repairs:

1)Replace the EGR temperature sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2374 PID: 131 SPN: 1209 FMI: 4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2357 PID: SID 146 SPN: 2791 FMI: 7 EGR Valve Control Circuit – Mechanical System Not Responding Properly or Out of Adjustment. The EGR motor has exceeded the duty cycle limit, indicating a stuck open EGR valve.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2376 PID: 412 SPN: 412 FMI: 4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR temperature circuit.

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 EGR temperature sensor shares return wires in the engine harness with other sensors. An open return can cause multiple fault codes to be active.

Possible causes:

1)A signal shorted to ground in the harness

Possible repairs:

1)Replace the EGR temperature sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2375 PID: 412 SPN: 412 FMI: 3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2374 PID: 131 SPN: 1209 FMI: 4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2359 PID: 411 SPN: 411 FMI: 0 Exhaust Gas Recirculation Valve Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level. The EGR differential pressure sensor has detected high EGR gas flow, or the EGR differential pressure reading is not valid for engine operating conditions.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2377 PID: SID 033 SPN: 647 FMI: 3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.

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 voltage level on this circuit. When the ECM commands the fan signal low, it expects the voltage level to be approximately 0-VDC. If it detects a high voltage, this fault is recorded.

If Fault Code 2377 is still active after completing the following troubleshooting steps, consult the OEM troubleshooting and repair manual for procedures to check the fan clutch device for an open circuit or short circuit to ground.

Possible causes:

1)An open circuit in the engine harness or fan control solenoid
2)A short circuit to voltage source in the OEM harness
3)A malfunctioning ECM.

Possible repairs:

1)Replace the fan control solenoid.
2)Repair or replace the OEM harness.
3)Replace the ECM.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2376 PID: 412 SPN: 412 FMI: 4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2375 PID: 412 SPN: 412 FMI: 3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2374 PID: 131 SPN: 1209 FMI: 4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2363 PID: SID 029 SPN: 1073 FMI: 4 Engine Brake Actuator Driver Output 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the engine brake solenoid number 2 signal circuit.

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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.

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 voltage level on the engine speed sensor +5 volt supply circuit. If the voltage falls below a limit which can be calibrated, then this fault is recorded.

Possible causes:

1)Short circuit to ground in the engine harness, sensor, or ECM.

Possible repairs:

1)Replace the engine speed sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.

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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 196 (3 wire sensor) PID: 111 SPN: 111 FMI: 4 Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at engine coolant level circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 196 (2 wire sensor) PID: 111 SPN: 111 FMI: 4 Coolant Level Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the engine coolant level circuit.

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PACCAR PX-8 CM2150 (2007-09) Fault Code: 2387 PID: SID 027 SPN: 641 FMI: 7 VGT Actuator Driver Circuit (Motor) – Mechanical System Not Responding Properly or Out of Adjustment.

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. If necessary, calibrate the ECM.

1)This fault code is set when the actual VGT actuator position does not meet the commanded position for more than 10 seconds.
2)Large boost pressure leaks can also cause this fault code.

The aftertreatment system must be inspected after making the appropriate repair outlined in this fault code troubleshooting tree. Progressive damage to the aftertreatment system can possibly have occurred. Perform the aftertreatment initial check procedure to test for a damaged diesel particulate filter.

1)For ISB engines, reference the ISB CM2150 Service Manual, Bulletin 4021578. Refer to Procedure 014-013 in Section 14.
2)For ISC and ISL engines reference the ISC and ISL CM2150 Service Manual, Bulletin 4021569. Refer to Procedure 014-013 in Section 14.

Inspect the aftertreatment system for potential damage.

Inspect the turbocharger vanes for residue, and clean the vanes, if required. Find the source of the residue and repair.

Possible repairs:

1)Repair or replace the component causing the charge-air system leaks.
2)Inspect the grid heater for damage or plugging. If found damaged, replace the grid heater and inspect the air handling system for debris.
3) replace the EGR cooler.
4)Replace the variable geometry turbocharger actuator.
5)Replace the turbocharger assembly.
6)Replace the damaged aftertreatment system component(s).
7)If necessary, calibrate the ECM.

PACCAR PX-8 CM2150 (2007-09) Fault Code: 2377 PID: SID 033 SPN: 647 FMI: 3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2376 PID: 412 SPN: 412 FMI: 4 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at EGR temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2375 PID: 412 SPN: 412 FMI: 3 Exhaust Gas Recirculation Temperature Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at EGR temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2374 PID: 131 SPN: 1209 FMI: 4 Exhaust Gas Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2373 PID: 131 SPN: 1209 FMI: 3 Exhaust Gas Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the exhaust gas pressure circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2367 PID: SID 80 SPN: 1073 FMI: 3 Engine Brake Actuator Driver Output 2 Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the engine brake solenoid number 2 signal circuit.

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