Wednesday, June 19, 2013

How to replace the Diverter Valve on a 2006 VW Passat 2.0T (000665 - Boost Pressure Regulation P0299 - 002 - Control Range Not Reached).

      At about 56,000 miles on my B6 Passat 2.0T , the CEL (Check Engine Light) came on, and when I scanned the car with VAG-COM, the following fault code was displayed:

000665 - Boost Pressure Regulation
               P0299 - 002 - Control Range Not Reached

When I first bought the B6 Passat 2.0T, it really had power when the turbo kicked in, and now it felt like the engine was revving but you couldn't feel that power that pushed you back in your seat. After some research, I found the following information at ECS Tuning stating that when the 2.0T was introduced, one of the first failing points was the rubber diaphragm in the original diverter valve, even under stock boost pressure.  When the seal fails, the boost escapes past the turbo, causing a large boost leak, which reduces performance.  After many revisions the entire unit was redesigned, and "D" version was introduced,  with a piston in place of the rubber diaphragm.  This is a mechanical design that is more durable and is a great upgrade for all stock or modified 2.0T FSI & TSI engines.

The part number for the Diverter Valve is 06H145710DKT , and the OEM Upgraded Diverter Valve (ES#:263879) can be purchased online from ECS Tuning.

You can see the torn rubber diaphragm at the base of the stock Diverter Valve which is the green one on the left compared to the OEM Upgraded Diverter Valve on the right.

Replacing the Diverter Valve on the B6 VW Passat 2.0T is very simple. It is located behind the engine in front of the firewall, and you can access this part from under the car. An easy way to identify the Diverter Valve is that it is fastened by 3 silver Hex screws and it has an electric connector that plugs into it as displayed in the center of the image below.

Disconnect the electric connector first, and then unscrew the 3 silver Hex screws which will release the Diverter Valve part.

Attach the new Diverter Valve, fasten it with the 3 silver Hex screws and connect the electric connecter to the Diverter Valve. You may need to reset the fault code with VAG-COM.

How To Replace the Air Cabin (AC) Filter on a 2006 VW Passat 2.0 T.

Changing the Air Cabin (AC) Filter on your VW yearly is a very good practice especially if you suffer from seasonal allergies or commute in an area with lots of construction and road work. The filter element is not an expensive repair at all. You can purchase an OEM Air Cabin (AC) Filter with discounted prices ranging from $11-$18 for a replacement part, and a yearly replacement interval. Why not eliminate unpleasant odors and enjoy cleaner fresh air while driving your VW.


The Air Cabin (AC) Filter is located under the glove compartment in front of the passenger front seat. 
Start by removing the 2 black plastic knobs that fasten the black foam cover.
This is the Air Cabin (AC) Filter compartment. You need to slide the black filter base cover to the right first and then pull it down to remove it.
This is the Air Cabin (AC) Filter Element.
Place a plastic bag or cover beneath the filter, then pull the Air Cabin (AC) Filter element down to remove it. By doing so, you will not have the dirt and debris from the filter falling on the passenger side foot compartment.
Insert vertically the new Air Cabin (AC) Filter Element
Place the filter base hooks into the filter slots as shown in the images below.
Push the filter into the compartment completely and then fasten the base by sliding it to the left side.
Put the foam cover back into place.
Fasten the foam cover by locking in the 2 plastic black knobs.