PACCAR MX (2004 Emissions) Fault Code: P0640 Grid Heater Relay – Voltage Too High or Short Circuit to Supply on...

PACCAR MX (2004 Emissions) Fault Code: P0650 Malfunction Indicator Lamp (MIl) – Current Too Low or Open Circuit on ECU...

PACCAR MX (2004 Emissions) Fault Code: P0666 Internal ECU Temperature – Data Erratic, Intermittent or Incorrect, at Ignition On SET...

PACCAR MX (2004 Emissions) Fault Code: P0668 Internal ECU Temperature – Internal Error SET CONDITIONS:The temperature measured by the internal...

PACCAR MX (2004 Emissions) Fault Code: P0669 Internal ECU Temperature – Internal Error SET CONDITIONS:The temperature measured by the internal...

PACCAR MX (2004 Emissions) Fault Code: P0685 PCI ECU – Short Circuit to Ground on ECU (D420) Pin (B3) SET...