PACCAR MX (2004 Emissions) Fault Code: P140A Crankcase Ventilation Module Rotor Speed – Data Valid but Too High

PACCAR MX (2004 Emissions) Fault Code: P140A Crankcase Ventilation Module Rotor Speed – Data Valid but Too High

SET CONDITIONS:
The PCI ECU (D420) detects that the measured rotating speed of the internal element is more than 14,000 rpm for more than 10 seconds.

DIAGNOSTIC CONDITION:
This diagnostic runs:
1. 600 seconds after the engine has been started and
2. When the coolant temperature is higher than 50°C [122°F]

CORRESPONDING OBD READINESS MONITOR:
None

RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.

REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back? (Can be pending, inactive or active)
– No, repair successful
– Yes, repair unsuccessful

POSSIBLE CAUSES:
Faulty crankcase ventilation module

ADDITIONAL INFORMATION:
The electromotor of the crankcase ventilation module (L136) drives an internal element at 12,000 rpm to separate the heavier oil particles from the crankcase gas. The rotating speed of the internal element is monitored by the PCI ECU.

IMPORTANT: If there is oil residue in the inlet side of the VTG turbocharger in combination with this DTC code, first diagnose the crankcase ventilation for the cause of the oil residue. The oil residue is commonly caused by a failing crankcase ventilation module.