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PACCAR PX-8 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-8 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-8 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-8 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-8 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-8 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-8 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.