Drinks too much diesel :( Lambda/Oxygen Sensor)

[Zeb]

My Passat has been drinking alot of diesel, in the past few months. I took it to the garage and they told me that I need to replace the Lambda Sensor, as this is causing the problem. In the morning, I always get a EML sign, and Emission garage! on the dash.

Could it be something else?

There is a slight misfire on 1st and 2nd gear, just below 2000rpm only for a few seconds. ECP are pricing their sensor for £116

Is there any websites, that sell them cheaper? I looked on ebay but they are going for the same price

[richball65]

Zeb, do diesels have a Lambda sensor, could be wrong but thought that was only on the petrol models.

I had the same problem with mine shortly before the injectors failed

What year and engine is it?


Rich

[Zeb]

Zeb, do diesels have a Lambda sensor, could be wrong but thought that was only on the petrol models.

I had the same problem with mine shortly before the injectors failed

What year and engine is it?


Rich

Tbh I'm not too sure, all I was told that the Lambda Sensor is causing the problem.

Year: 2005

Engine: 2.0 TDI - BKP engine code

[richball65]

If you know someone or know of a local indy VW garage, or even your local dealer I would get them to diagnose the problem with VCDS. This will give them a fault code as to why the lights are on the dash. I would do this sooner rather than later as if it is the injectors when the completly fail the engine just shuts down and will not re-start. I speak from experience. Happend to me in the outside lane of the M57

Sorry to be a profit of doom lol !

There again it could be something simple !!

[Zeb]

If you know someone or know of a local indy VW garage, or even your local dealer I would get them to diagnose the problem with VCDS. This will give them a fault code as to why the lights are on the dash. I would do this sooner rather than later as if it is the injectors when the completly fail the engine just shuts down and will not re-start. I speak from experience. Happend to me in the outside lane of the M57

Sorry to be a profit of doom lol !

There again it could be something simple !!

I will do that

I do have the diagnostic kit, so I just delete it whenever it comes up. The code is usually 17519? I will check tomorrow to see what code it is.

[DSG4ME]

Ok, first job, replace the coolant sensor, GSF is always cheaper, and what are your mpg figures?

[martin1810]

17519 P1111 Oxygen (Lambda) Sensor Regulation Bank 1, System too Lean

Yes the 2.0 diesel does have a lambda sensor. You will have to replace it to see if it helps.
DSG4ME..B6 doesn't have problems with coolant temp sensor because it is self aware. It will flag a code if the coolant sensor is out of spec. Not like on the old models.

[Zeb]

The code is 17519. I will look into this, and find out where I can the sensor slightly cheaper.
I filled her up by 7 litres last night, I drove 6.7 miles and was getting 30.6 mpg in the city. On the motorway I was getting around 40.6mpg. Diesel miles showed 145 miles/distance I can travel, the needle was on the 1/4 mark. Within those miles the distance/miles went lower and was showing 120! The needle dropped by another 1/4 of diesel.

This just doesn't seem right, plus the slight misfire which only happens in 1st and 2nd gear.

[RicardoA4Sline]

The only reliable way is to check mpg from a ful tank to tank (even part top up) but 7 litres here and there wont really give you a reliable indication - what does it normally show on the mfd?

could it be MAF or EGR related stuff?

[Zeb]

The only reliable way is to check mpg from a ful tank to tank (even part top up) but 7 litres here and there wont really give you a reliable indication - what does it normally show on the mfd?

could it be MAF or EGR related stuff?

Yeah your right! In the city the mpg shows 33.6 - 35.5, and in the motorway it's 45.8 - 48.8mpg.

If it was the EGR then the car will cough out alot of black smoke, the maf has been replaced by the previous owner.