PACCAR MX (2004 Emissions) Fault Code: P1658 PCI ECU – Internal Error
PACCAR MX (2004 Emissions) Fault Code: P1658 PCI ECU – Internal Error
SET CONDITIONS:
The PCI ECU (D420) detects an internal hardware error.
DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the ignition is on.
RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.
POSSIBLE CAUSES:
Defective PCI ECU (D420)
