The regeneration process for the particle filter can cause engine oil from the crankcase breather and/or the turbocharger to accumulate in the charge-air cooler.
Under certain operating conditions, the oil can get into the combustion chamber and cause a significant amount of smoke. In extreme cases, it can even cause engine damage.
To eliminate this problem, the engine control unit should be replaced and the charge-air cooler checked and replaced if necessary.
Although the owners of the affected models have been informed, it can be assumed for various reasons that not all vehicles have been modified.
The fact that this action has been taken should be noted in the Subaru dealer system (action SA 201501).
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The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
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