Paccar

PACCAR PX-6 CM2150 (2007-09) Fault Code: 253 PID: 98 SPN: 98 FMI: 1 Engine Oil Level – Data Valid But Below Normal Operational Range – Most Severe Level. Very low oil level has been detected by the oil level 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.

If inactive counts of Fault 253 are logged in the ECM, it could be possible that the engine was running or keyed on while tilted at an angle severe enough to cause this fault to be triggered.

Possible causes:

1)The engine may not have been filled to proper capacity during the most recent oil change
2)External engine oil leaks (oil leaking onto the ground)
3)Internal engine oil leaks (oil leaking into the fuel system or cooling system)
4)High engine oil consumption/power cylinder failure (check for abnormally high blowby when the engine is loaded).

Possible repairs:

1)Replace the lubricating oil level sensor.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 252 PID: 98 SPN: 98 FMI: 2 Engine Oil Level – Data Erratic, Intermittent, or Incorrect. An intermittent signal is being received from the oil level sensor.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 249 PID: 171 SPN: 171 FMI: 3 Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at ambient air temperature circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 245 PID: SID 033 SPN: 647 FMI: 4 Fan Control Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fan control circuit when commanded ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 242 PID: 84 SPN: 84 FMI: 10 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change. Signal indicates an intermittent connection or VSS tampering.
PACCAR PX-6 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.
PACCAR PX-6 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.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.

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, calibrate the ECM. Use the following procedure in the corresponding Troubleshooting and Repair Manual for the engine being serviced.

At KEY ON, before the engine starts, the sensor readings for intake manifold pressure, barometric air pressure, and exhaust gas pressure are compared to each other. This fault code occurs if the exhaust gas pressure sensor reading is different from the other sensor readings. This check is only done once after the keyswitch is turned ON.

Possible causes:

1)A stuck in-range exhaust gas pressure sensor reading
2)A high resistance in the exhaust gas pressure sensor signal or return lines
3)Plugging or restriction in the exhaust gas pressure sensor tube.

Possible repairs:

1)Replace the exhaust gas pressure sensor.
2)Repair or replace the engine harness.
3)Clean or replace the exhaust gas pressure sensor tube.
4)If necessary, calibrate the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2449 PID: SID 027 SPN: 641 FMI: 13 VGT Actuator Controller – Out of Calibration. The VGT has failed the automatic calibration procedure at initial key-ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2448 PID: SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level. Low engine coolant level detected.
PACCAR PX-6 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. The smart VGT controller has detected incorrect stop limits, or the VGT is unable to move to the closed position.
PACCAR PX-6 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-6 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.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater 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. Use the following procedure to calibrate the ECM, if necessary.

Possible causes:

1)Intake air heater relay signal wire not connected to the relay
2)Intake air heater relay return wire not connected to the relay
3)Open circuit in the intake air heater relay signal wire
4)Open circuit in the intake air heater relay return wire
5)Intake air heater signal wire shorted to a voltage source.

Possible repairs:

1)Replace the intake air heater relay.
2)Repair or replace the OEM harness.
3)Replace the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2449 PID: SID 027 SPN: 641 FMI: 13 VGT Actuator Controller – Out of Calibration. The VGT has failed the automatic calibration procedure at initial key-ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2448 PID: SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level. Low engine coolant level detected.
PACCAR PX-6 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. The smart VGT controller has detected incorrect stop limits, or the VGT is unable to move to the closed position.
PACCAR PX-6 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.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater 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 shorted intake air heater relay
2)Intake air heater relay supply wire shorted to ground.

Possible repairs:

1)Replace the intake air heater relay.
2)Repair or replace the OEM harness.
3)Replace the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2449 PID: SID 027 SPN: 641 FMI: 13 VGT Actuator Controller – Out of Calibration. The VGT has failed the automatic calibration procedure at initial key-ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2448 PID: SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level. Low engine coolant level detected.
PACCAR PX-6 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. The smart VGT controller has detected incorrect stop limits, or the VGT is unable to move to the closed position.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2557 PID: SID 057 SPN: 697 FMI: 3 Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the analog torque 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 faulty transmission shift modulator
2)An open circuit in the output device driver return wire
3)A pin-to-pin short circuit in the output device driver wire.

Possible repairs:

1)Replace the transmission shift modulator.
2)Repair or replace the OEM harness.
3)Replace the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2449 PID: SID 027 SPN: 641 FMI: 13 VGT Actuator Controller – Out of Calibration. The VGT has failed the automatic calibration procedure at initial key-ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2448 PID: SPN: 111 FMI: 1 Coolant Level – Data Valid but Below Normal Operational Range – Least Severe Level. Low engine coolant level detected.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2558 PID: SID 057 SPN: 697 FMI: 4 Auxiliary PWM Driver 1 – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the analog torque 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 faulty transmission shift modulator
2)An short circuit to ground on the output device driver line
3)A short pin-to-pin in the output device driver line.

Possible repairs:

1)Replace the transmission shift modulator.
2)Repair or replace the OEM harness.
3)Replace the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2557 PID: SID 057 SPN: 697 FMI: 3 Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2449 PID: SID 027 SPN: 641 FMI: 13 VGT Actuator Controller – Out of Calibration. The VGT has failed the automatic calibration procedure at initial key-ON.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 256 PID: 171 SPN: 171 FMI: 4 Ambient Air Temperature Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the ambient air 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 ambient air temperature sensor shares return wires in the engine harness with other sensors. Opens and shorts in the engine harness can cause multiple fault codes to be active. Check fault codes with multiple counts first.

Possible causes:

1)Signal circuit shorted to ground in the harness
2)Signal circuit shorted to return or ground in the sensor.

Possible repairs:

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

PACCAR PX-6 CM2150 (2007-09) Fault Code: 253 PID: 98 SPN: 98 FMI: 1 Engine Oil Level – Data Valid But Below Normal Operational Range – Most Severe Level. Very low oil level has been detected by the oil level sensor.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 252 PID: 98 SPN: 98 FMI: 2 Engine Oil Level – Data Erratic, Intermittent, or Incorrect. An intermittent signal is being received from the oil level sensor.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 249 PID: 171 SPN: 171 FMI: 3 Ambient Air Temperature Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at ambient air temperature circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 245 PID: SID 033 SPN: 647 FMI: 4 Fan Control Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fan control circuit when commanded ON.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 242 PID: 84 SPN: 84 FMI: 10 Wheel-Based Vehicle Speed Sensor Circuit Tampering Has Been Detected – Abnormal Rate of Change. Signal indicates an intermittent connection or VSS tampering.
PACCAR PX-6 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.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2634 PID: SID 027 SPN: 641 FMI: 12 VGT Actuator Controller – Bad Intelligent Device or Component. An internal error has been detected by the smart VGT controller.

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, calibrate the ECM.

This fault code is logged when the VGT smart actuator detected an internal error within the VGT actuator. The VGT actuator will stop controlling the turbocharger when this fault code is active.

Fault Code 2634 will become active if the VGT actuator is removed from the turbocharger and then the keyswitch is turned to the on position or it may be possible for it to become active if the actuator fails the install/calibrate procedure. If this occurs, disconnect the VGT actuator from the engine harness with the keyswitch on, and connect the VGT actuator to the engine harness. Fault Code 2634 should go inactive. Follow the VGT actuator installation procedure to install the VGT actuator.

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

For ISB engines, see the following procedure in the ISB CM2150 Service Manual, Bulletin 4021578. For ISC and ISL engines, see the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569.

Possible repairs:

1)Remove the actuator and install it in the correct position.
2)Replace the VGT actuator.
3)Replace the damaged aftertreatment component.
4)If necessary, calibrate the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2558 PID: SID 057 SPN: 697 FMI: 4 Auxiliary PWM Driver 1 – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2557 PID: SID 057 SPN: 697 FMI: 3 Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2451 PID: SPN: 2789 FMI: 0 Turbocharger Turbine Inlet Temperature (Calculated) – Data Valid but Above Normal Operational Range – Moderately Severe Level. Turbocharger turbine inlet temperature has exceeded the engine protection limit.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2635 PID: SID 027 SPN: 641 FMI: 11 VGT Actuator Driver Circuit – Condition Exists. A calibration mismatch between the VGT actuator and the ECM has been detected.

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, calibrate the ECM again.

This fault code is logged when the primary engine ECM does not receive valid J1939 information from the VGT actuator.

Troubleshoot high inactive counts of Fault Code 2636 as an active fault code.

Possible causes:

1)The VGT actuator is not receiving power from the ECM. This could be caused by an open circuit in the power supply wire or low voltage supplied by the primary engine ECM
2)An open return circuit on the VGT actuator circuit
3)An open or short circuit on the J1939 data link circuit between the ECM and VGT actuator
4)Intermittent communications between the VGT actuator and the primary engine ECM on the J1939 data link
5)Rapid cycling of the keyswitch
6)Connector pins are not installed in the appropriate locations specified by the wiring diagram.
7)A damaged termination resistor in the engine data link harness
8)A damaged engine ECM.

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

Possible repairs:

1)Replace the VGT actuator.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2634 PID: SID 027 SPN: 641 FMI: 12 VGT Actuator Controller – Bad Intelligent Device or Component. An internal error has been detected by the smart VGT controller.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2558 PID: SID 057 SPN: 697 FMI: 4 Auxiliary PWM Driver 1 – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2557 PID: SID 057 SPN: 697 FMI: 3 Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2554 PID: 131 SPN: 1209 FMI: 2 Exhaust Gas Pressure – Data Erratic, Intermittent, or Incorrect. The exhaust gas pressure sensor is reading an erratic value at initial Key On.

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PACCAR PX-6 CM2150 (2007-09) Fault Code: 2636 PID: SID 027 SPN: 641 FMI: 9 VGT Actuator Driver Circuit – Abnormal Update Rate. No communications on the J1939 data link between the engine ECM and the smart VGT controller.

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, calibrate the ECM again.

This fault code is logged when the primary engine ECM does not receive valid J1939 information from the VGT actuator.

Troubleshoot high inactive counts of Fault Code 2636 as an active fault code.

Possible causes:

1)The VGT actuator is not receiving power from the ECM. This could be caused by an open circuit in the power supply wire or low voltage supplied by the primary engine ECM
2)An open return circuit on the VGT actuator circuit
3)An open or short circuit on the J1939 data link circuit between the ECM and VGT actuator
4)Intermittent communications between the VGT actuator and the primary engine ECM on the J1939 data link
5)Rapid cycling of the keyswitch
6)Connector pins are not installed in the appropriate locations specified by the wiring diagram.
7)A damaged termination resistor in the engine data link harness
8)A damaged engine ECM.

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

Possible repairs:

1)Replace the VGT actuator.
2)Flush the dirt, debris or moisture from the connector pins.
3)Replace the engine harness.
4)Replace the OEM harness.
5)Check the battery voltage and the OEM wiring between the battery and the ECM power harness connector.
6)Replace the J1939 termination resistor.
7)If necessary, calibrate the ECM.

PACCAR PX-6 CM2150 (2007-09) Fault Code: 2635 PID: SID 027 SPN: 641 FMI: 11 VGT Actuator Driver Circuit – Condition Exists. A calibration mismatch between the VGT actuator and the ECM has been detected.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2634 PID: SID 027 SPN: 641 FMI: 12 VGT Actuator Controller – Bad Intelligent Device or Component. An internal error has been detected by the smart VGT controller.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2558 PID: SID 057 SPN: 697 FMI: 4 Auxiliary PWM Driver 1 – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2557 PID: SID 057 SPN: 697 FMI: 3 Auxiliary PWM Driver 1 – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the analog torque circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2556 PID: SID 070 SPN: 729 FMI: 4 Intake Air Heater 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at the intake air heater signal circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 2555 PID: SID 070 SPN: 729 FMI: 3 Intake Air Heater 1 Circuit – Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit.

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