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 this fault code occurs during road test, verify that all connectors are clean and free of corrosion before replacing components.
Possible causes:
1)Fuel pump actuator high resistance 2)Engine harness high resistance 3)Loose, worn, or corroded connectors or pins 4)Fuel pump actuator with low internal resistance 5)Fuel pump actuator or engine harness that has shorted to ground 6)Intermittent circuit failures that cause the fuel pressure to exceed the fuel rail pressure relief valve opening pressure.
If an intermittent electrical circuit problem of the fuel pump actuator circuit exists, it is possible for the fault code to become active then inactive during normal engine operation. For example, if a poor connection causes an intermittent open or short circuit, the normally open valve will open in a fraction of a second while the circuit is faulty, causing the fuel rail pressure relief valve to open. Following the event that caused the fuel rail pressure relief valve to open, the ECM will attempt to reset the fuel rail pressure relief valve, provided the fuel pump actuator circuit is not still faulty.
Possible repairs:
1)Replace the fuel pump actuator. 2)Repair or replace the engine harness.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2273 PID: 411 SPN: 411 FMI: 3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2272 PID: 27 SPN: 27 FMI: 4 EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage has been detected at the EGR valve position sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2266 PID: SID 126 SPN: 1075 FMI: 4 Electric Lift Pump for Engine Fuel Supply Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fuel lift pump circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2265 PID: SID 126 SPN: 1075 FMI: 3 Electric Lift Pump for Engine Fuel Supply Circuit – Voltage Above Normal or Shorted to High Source. High voltage or open detected at the fuel lift pump 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, calibrate the ECM.
During engine operation, the ECM monitors the primary speed sensor (crankshaft speed sensor) signal. Fault Code 689 will become active and light the yellow lamp if the signal from the primary speed sensor is not present or degraded for more than 3 continuous seconds. Meanwhile, if the primary engine speed sensor signal is not present or is degraded for a moment (less than 3 seconds), the ECM will interrupt injection events based on the primary engine speed sensor and resume injection events using the backup engine speed sensor. Engine power will be reduced while the injection events are based on the backup speed sensor. If the primary speed sensor signal returns, the ECM will automatically interrupt injection events based on the backup speed sensor and resume injection events based on the primary speed sensor. If over a period of time, the ECM detects several incidents of a loss of the primary speed sensor signal, this fault code will become active.
A vehicle operator can notice an intermittent “misfire” if the injection events are interrupted while the ECM switches from control based on the primary and secondary speed sensors. Also, a vehicle operator can notice intermittent “low power” if a “glitch” in the primary speed sensor signal causes the engine to intermittently use the backup speed sensor for injection control.
This fault code becomes active whenever the ECM detects a persistent loss of the primary engine speed sensor signal over a short period of time.
This fault becomes inactive at each key ON or if the ECM does not detect a loss of the primary engine speed sensor signal for at least 20 minutes.
Possible causes:
1)Intermittent loss of primary speed sensor signal; the most likely cause is an intermittent open or short circuit that can be experienced with speed sensor connector problems 2)Sensor air gap that is marginally too small or too large.
Actions to take if this fault is intermittent:
1)Look for intermittent engine harness connections in the primary engine speed sensor circuit 2)Look for loose connections at the ECM connector where the pins can not be locked into the socket 3)Look for places where the engine harness has worn into a nearby component, causing an intermittent short circuit 4)Look for pin wear at the speed sensor 5)Inspect the target wheel for damage.
Possible repairs:
1)Repair or replace the engine harness. 2)Replace or shim the sensor if air gap is out of specification. If the target runout is excessive, replace the target. 3)Replace the engine crankshaft speed/position sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2311 PID: SID 108 SPN: 633 FMI: 11 Electronic Fuel Injection Control Valve Circuit – Condition Exists. Fuel pump actuator circuit resistance too high or too low.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2273 PID: 411 SPN: 411 FMI: 3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2272 PID: 27 SPN: 27 FMI: 4 EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage has been detected at the EGR valve position sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2266 PID: SID 126 SPN: 1075 FMI: 4 Electric Lift Pump for Engine Fuel Supply Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the fuel lift pump 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, calibrate the ECM.
During engine operation, the ECM monitors the secondary speed sensor (camshaft speed sensor) signal. Fault Code 778 will become active and light the yellow lamp if the signal from the secondary speed sensor is not present or degraded for more than 3 continuous seconds. If, over a period of time, the ECM detects several incidents of a loss of the secondary speed sensor signal, but the signal loss is short in duration, this fault code will become active. Since the secondary engine speed signal is not used for normal engine operation, a vehicle operator should not notice any symptoms related to this problem.
This fault code becomes active whenever the ECM detects a persistent loss of the secondary engine speed sensor signal over a short period of time.
This fault becomes inactive at each key-ON or if the ECM does not detect a loss of the secondary engine speed sensor signal for at least 20 minutes.
Possible causes:
1)Intermittent loss of primary speed sensor signal; the most likely cause is an intermittent open or short circuit that can be experienced with speed sensor connector problems 2)Sensor air gap that is marginally too small or too large, or target wheel exhibits excessive runout.
Actions to take if this fault is intermittent:
1)Look for intermittent engine harness connections in the secondary engine speed sensor circuit 2)Look for loose connections at the ECM connector where the pins can not be locked into the socket 3)Look for places where the engine harness has worn into a nearby component, causing an intermittent short circuit 4)Look for pin wear at the speed sensor 5)Inspect the target wheel for damage.
Possible repairs:
1)Repair or replace the engine harness. 2)Replace or shim the sensor if the air gap is out of specification. If the target runout is excessive, replace the target. 3)Replace the engine camshaft speed/position sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2311 PID: SID 108 SPN: 633 FMI: 11 Electronic Fuel Injection Control Valve Circuit – Condition Exists. Fuel pump actuator circuit resistance too high or too low.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2273 PID: 411 SPN: 411 FMI: 3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2272 PID: 27 SPN: 27 FMI: 4 EGR Valve Position Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage has been detected at the EGR valve position sensor 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)External fuel sources drawn into the intake air passage 2)Reverse powering (motoring) of the engine 3)Tampering of the engine speed/position sensors
Inspect the intake manifold for sources of flammable vapors. Check the turbocharger seals to verify that there are no oil leaks. Inspect the engine speed/position sensors for damage or tampering.
Possible repairs:
1)Replace the crankshaft engine speed sensor. 2)Replace the camshaft engine position sensor 3)Replace the ECM.
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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 195 (3 wire sensor) PID: 111 SPN: 111 FMI: 3 Coolant Level Sensor 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at engine coolant level 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, calibrate the ECM.
This fault becomes active if the engine is running and the turbocharger speed signal rapidly changes faster than the capabilities of the turbocharger. This fault code can be caused by an intermittent turbocharger speed sensor connection, incorrect turbocharger speed sensor air gap, or a faulty turbocharger speed sensor.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2311 PID: SID 108 SPN: 633 FMI: 11 Electronic Fuel Injection Control Valve Circuit – Condition Exists. Fuel pump actuator circuit resistance too high or too low.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2273 PID: 411 SPN: 411 FMI: 3 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the EGR differential pressure sensor 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.
This fault code is an information fault code indicating that the engine has been derated for high turbine inlet temperature (exhaust temperature). No troubleshooting is necessary for this fault code. It is only an indicator that the engine power was derated to limit the exhaust temperature.
If the condition continues to exist, Fault Code 2451 will become active.
The engine power output was derated to limit the exhaust temperatures. This is normal operation. No repairs are necessary.
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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2311 PID: SID 108 SPN: 633 FMI: 11 Electronic Fuel Injection Control Valve Circuit – Condition Exists. Fuel pump actuator circuit resistance too high or too low.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2274 PID: 411 SPN: 411 FMI: 4 Exhaust Gas Recirculation Valve Delta Pressure Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the EGR differential pressure sensor 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 caused:
1)Air intake leaks allowing hot under-hood air to enter the intake system 2)Faulty intake manifold pressure readings 3)High turbocharger speed readings 4)Faulty barometric pressure readings 5)Stuck variable geometry turbocharger.
Note: Unless the failure is a failed barometric pressure sensor or intake manifold pressure sensor, this fault code will most likely not be active with no load in the shop. The engine will most likely need to be loaded to trip this fault code, and to determine if the failure has been found and fixed.
Possible repairs:
1)Replace the barometric pressure sensor. 2)Replace the intake manifold pressure sensor.
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.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2311 PID: SID 108 SPN: 633 FMI: 11 Electronic Fuel Injection Control Valve Circuit – Condition Exists. Fuel pump actuator circuit resistance too high or too low.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 2288 PID: 103 SPN: 103 FMI: 0 Turbocharger 1 Speed – Data Valid but Above Normal Operational Range – Least Severe Level. High turbocharger speed has been detected by the ECM.
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.
Possible causes:
1)EGR motor circuit open circuit 2)Open circuit in the wiring harness 3)Fuel Injector wiring harness shorted to ground, open circuit, or shorted to power supply.
Possible repairs:
1)Replace the EGR valve. 2)Repair or replace the engine harness.
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.
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)EGR motor circuit shorted to ground 2)EGR motor circuit shorted to battery supply.
Possible repairs:
1)Repair or replace the engine harness. 2)Replace the EGR valve motor. 3)Replace 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.
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.
This fault code is triggered when the EGR valve motor is unable to move the EGR valve in the open position. This is normally caused by a restriction in the EGR valve not allowing the EGR valve to move to the commanded position.
The fault code will be inactive at key-on. It will only go active if the EGR valve is commanded open and the EGR valve is unable to move to the commanded position.
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 (DPF).
1)For reuse guidelines for ISB CM2150 engines, use the following procedure in the ISB CM2150 Service Manual, Bulletin 4021578. Refer to Procedure 014-013 in Section 14. 2)For reuse guidelines for ISC and ISL CM2150 engines, use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569. Refer to Procedure 014-013 in Section 14.
Possible causes:
1)Fuel Injector wiring harness shorted to ground, open circuit, or shorted to power supply.
Possible repairs:
1)Replace the EGR valve assembly. 2)Replace the damaged aftertreatment component.
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.
