Replacing and adapting the Exhaust Pressure Sensor

[Lambeth Cali]

I have a 2008 T5 174 California and have replaced the G450 exhaust pressure sensor (076906051A) and adapted it using VCDS Lite.

2 years ago the engine light came on in our Cali. My VW specialist garage told me the error code suggested it was the exhaust pressure sensor and that as the van was running perfectly the sensor was probably faulty and the DPF ok. The van has done 40,000 miles, mainly on French motorways. As the van ran fine, I ignored the light for almost 2 years, and drove thousands of miles but eventually bought a code reader. It showed error 01137 Exhaust Pressure Sensor ‘A‘ Range. I decided to replace it.

My VW specialist didn’t seem that keen and I rang my nearest dealer, but they didn’t call back. I loathe my local dealers so bought a sensor myself on eBay. The correct part is 076906051A. (There is a 076906051B for newer Calis) I ended up buying 3 as the first that arrived was manufactured in 2009 which I thought might be equally duff to mine, and so I bought another that had a 2018 date and then I bought another as a spare.




This was the one I have fitted. The VW AG 47/18 code means it was manufactured in week 47 in 2018.
I watched various YouTube videos

First I had to move three other sensors out of the way. These are loosely clipped in front.
You need a Allen key to undo the bolt and some pliers to loosen the clamps on the hoses. These are difficult to get off but it takes five minutes jiggling. A spot of washing up liquid on the new sensor helped me slide the hoses on. The whole swap took about fifteen minutes.

I then need to perform the ‘adaptation’. This involves using VCDS LITE (free) to tell the engine management system that a new sensor is fitted and will have new high and low levels. The sensor contains a crystal that measures small changes in pressure in the DPF to tell the engine management that the DPF is working correctly and also may or may not need a regeneration cycle.
I bought this cable.


I connected to my wife’s laptop and followed these instructions -

and http://www.totalcardiagnostics.com/...-to-install-vag-com-4091-kkl-cable-on-windows
and

Ross-Tech: VCDS-Lite: Download

This all went very smoothly and after twenty minutes we were plugging into the van and following these instructions

VCDS Lite is slightly different to look at than full VCDS but it took five minutes and after typing in the 30605 code and clicking DO IT we reset the codes and the sensor was adapted.

After 2 1/2 years the engine light was out!
The 3 sensors cost £30 (the 2009 one I didn’t use) £20 for the one I used, and £10 for the one I’m keeping as a spare. The cable cost £14.95.

Fixed, I hope.

 

[v-tec]

Good info
Differential pressure sensors get dirty from carbon and then chucks the EML on
changed a few over the years,
The most important thing is to Zero the new sensor with the ecu

 

[Elmo3]

Good work! I did similar with the N75 (moo valve) recently. Piece of cake and satisfying to fix it yourself.

 

[sidepod]

This forum needs more of this stuff. Strong work.

 

[Lambeth Cali]

I was dreading starting the Cali up for a half-term trip to Norfolk, but the engine light remains off after a week driving around.

So surprised and relieved and there is nothing like fixing something yourself. The most difficult thing was getting my wife’s IT boss to authorise downloading VCDS Lite to her laptop. They were both amazed at how ancient VCDS was.

 

[Lambeth Cali]

I was dreading starting the Cali up for a half-term trip to Norfolk, but the engine light remains off after a week driving around.

So surprised and relieved and there is nothing like fixing something yourself. The most difficult thing was getting my wife’s IT boss to authorise downloading VCDS Lite to her laptop. They were both amazed at how ancient VCDS was.

April 2021 and engine light still off. Both relieved and amazed.