2013 PACCAR MX-13 – P0046 VTG turbo charger actuator position – Reference fault or internal error

Fault code information

1 trip MIL
3 drive cycle recovery
Readiness group – None
Freeze frame type – Boost

Location of component(s)

Diagnostic condition

This diagnostic runs continuously when the ignition is on.

Set condition of fault code

* The VTG turbo charger actuator (L037) detects:
* the reference point is not detected
* the end stops are out of range, or
* the calibration procedure with DAVIE cannot be finished correctly, or
* an internal actuator failure

Reset condition of fault code

* This DTC will change to inactive after the ignition is keyed off and on again and the diagnostic runs              and passes.

Electrical diagram(s)

Technical data

Possible causes

* After an installation of the actuator: no or incorrect initialization procedure run through.
* Frozen actuator/nozzle ring assembly
* Faulty actuator or turbo charger nozzle ring mechanism.
Check the actuator and the turbo charger nozzle ring mechanism:
1. Remove the actuator. Check the sector gear travel.
1. 2.Check the actuator output gear for damage
2. Check the actuator output gear for adequate rotation (minimum of one complete rotation).
3. 4. Initialize the turbo actuator after installation.

Additional information

* The position and effort to move the VTG turbo charger nozzle ring are monitored by the actuator.
* The position of the actuator is monitored with an internal sensor and a reference magnet (reference        point).
* After the ignition is keyed on, a learn sweep is performed by the actuator. During this sweep the VTG        turbo charger nozzle ring is fully opened and fully closed to check the end positions.
* The actuator motor is switched off with this fault active.

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