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PACCAR PX-8 CM2150 (2007-09) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric Pressure – Data Erratic, Intermittent, or Incorrect. The ambient air 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, recalibrate the ECM.
At key-on, before the engine starts, the sensor readings for intake manifold pressure, exhaust gas pressure (if equipped), and engine oil pressure (if equipped) are compared with the barometric pressure. This fault code occurs if the barometric pressure sensor reading is different from the other three. This check is only done once after the keyswitch is turned on.
Possible causes:
1)Stuck in-range barometric pressure sensor reading.
2)High resistance in the barometric pressure sensor signal or return lines.
On ISB applications, this fault code will go active if the intake manifold pressure/temperature sensor is accidentally installed in the ambient air temperature/pressure sensor location. These sensor appear the same on the outside and can be accidentally interchanged.
Possible repairs:
1)Replace the barometric pressure sensor.
2)Replace the ECM.
3)Repair or replace the engine harness.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 294 PID: 441 SPN: 441 FMI: 4 Auxiliary Temperature Sensor Input 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 293 PID: 441 SPN: 441 FMI: 3 Auxiliary Temperature Sensor Input 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 292 PID: 441 SPN: 441 FMI: 14 Auxiliary Temperature Sensor Input 1 – Special Instructions.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 288 PID: 372 SPN: 974 FMI: 2 AE J1939 Multiplexing Remote Accelerator Pedal or Lever Position Sensor System – Received Network Data In Error. The OEM vehicle electronic control unit (VECU) detected a fault with the remote accelerator.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 287 PID: 91 SPN: 91 FMI: 2 E J1939 Multiplexed Accelerator Pedal or Lever Sensor System – Received Network Data In Error. The OEM vehicle electronic control unit (VECU) detected a fault with its accelerator pedal.
PACCAR PX-8 CM2150 (2007-09) Fault Code: 286 PID: SID 231 SPN: 639 FMI: 13 SAE J1939 Multiplexing Configuration Error – Out of Calibration. The ECM expected information from a multiplexed device but only received a portion of the necessary information.