Volkswagen: AdBlue Warning
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Volkswagen Tech Tip: AdBlue Warning Due To Leak At Reductant Injector

On models with the diesel engine, the AdBlue warning might be illuminated and code P20E8 for reductant pressure too low might be stored in the ECM.

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Figure 1

Models:

2015 Jetta, Beetle, Passat and Golf with the 2.0 TDI engine.

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Condition:

On these models with the diesel engine, the AdBlue warning might be illuminated and code P20E8 for reductant pressure too low might be stored in the ECM.

Cause:

The welding process used to seal the reductant line and connector to the supply line has leakage at the reductant injector.

Solution:

VW has issued an improved supply line assembly to eliminate the leak.

Figure 2

Service Procedure:

  1. Inspect the connection of the reductant supply line connector at the injector.
  2. If white crystalized (dried) AdBlue is found at the injector, replace the supply line. (See Figures 1 and 2).
  3. Thoroughly clean the area with water to remove the buildup.
  4. Refill the tank with AdBlue.

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