Fault code information
1 trip MIL
3 drive cycle recovery
Readiness group – None
Freeze frame type – Fuel
Description of component(s)
Location of component(s)
Diagnostic condition
This diagnostic runs continuously when the engine is running.
Set condition of fault code
The PCI ECU (D420) detects that one or more holes in the flywheel are not detected within one crankshaft revolution.
Reset condition of fault code
This DTC changes to inactive when the fault is no longer detected. To validate the repair, key the ignition off for at least 15 seconds, key on again. Then start the engine and let it idle for 2 minutes.
Electrical diagram(s)
Technical data
Possible causes
* Faulty crankshaft sensor signal
* Check the effective AC voltage (VAC) generated by the sensor.
* Damaged flywheel
* Faulty crankshaft sensor
Additional information
* Crankshaft sensor (F552) is used to determine the crankshaft speed and position.
* It is possible that the camshaft sensor (F558) is used as backup to run the engine.
* Engine torque is reduced.
