Lambda sensors

pang · 18-02-2008, 13:41

Hi,

Using Vag Com 409, i get the following Lambda sensor readings;

at idle;
group 006 = -7 and 18, group 008 = 5.5 and 2.3.

When i throttle (accelerate in neutral) to 2500rpm quickly, the lambda readings change to;
group 006 = 5.5 and -0.8, group 008 = 1.6 and 2.3 (the 2.3 reading does not change at all!)

Can anyone explain why there are 4 lambda readings and what these reading should be if the car is functionally normally?

Car is a 99 golf mk4 1.8T

Thx

Theresias · 19-02-2008, 18:11

What's your ECU part number?

pang · 20-02-2008, 16:02

Am not sure. Vag com provides me the following numbers;

Controller: 06A 906 018 R
Component: 1.8L R4/5VT MOTR HS D06

Is this what you was after?

Theresias · 20-02-2008, 16:08

Yeah, that's what I was looking for. Here's an excerpt from the AGU label file.

Quote:

6,0,Idle Stabilisation - Spec figures at Idle
6,1,Idle speed,800-920 rpm
6,2,Idle reg,-10-10%
6,3,Lambda reg,-10-10%
6,4,Ign angle,6-12 BTDC
;
7,0,Lambda learned values
7,1,Lambda reg,-10-10%
7,2,Probe volts,0-1V
7,3,Valve duty,angle 0-99%
7,4,Correction,0.3-1.25
;
8,0,Lambda learned values
8,1,Inj. period,1-3 m/s
8,2,Idle learned,-10-10%
8,3,Learned,-8-8%
8,4,Vent mode

pang · 21-02-2008, 10:10

Thanks Sebastian.

Does this mean that the Lambda sensor is faulty? In group 8, the learned lambda readings do not change...stays at 2.3.

The symptoms i am seeing from the car is that the turbo is non existent! (8 - 50mph took 8secs in 2nd gear - maf read 116g/s at 6000rom).

Also fuel economy is really poor, 20mpg!

18-02-2008, 13:41	#1
pang Briskodian Join Date: Feb 2008 Posts: 3 Thanks: 1 Thanked 0 Times in 0 Posts	Lambda sensors Hi, Using Vag Com 409, i get the following Lambda sensor readings; at idle; group 006 = -7 and 18, group 008 = 5.5 and 2.3. When i throttle (accelerate in neutral) to 2500rpm quickly, the lambda readings change to; group 006 = 5.5 and -0.8, group 008 = 1.6 and 2.3 (the 2.3 reading does not change at all!) Can anyone explain why there are 4 lambda readings and what these reading should be if the car is functionally normally? Car is a 99 golf mk4 1.8T Thx

19-02-2008, 18:11	#2
Theresias Briskodian Join Date: Apr 2006 Location: Mid Germany Posts: 404 Thanks: 1 Thanked 29 Times in 26 Posts	Re: Lambda sensors What's your ECU part number? __________________ Sebastian

20-02-2008, 16:02	#3
pang Briskodian Join Date: Feb 2008 Posts: 3 Thanks: 1 Thanked 0 Times in 0 Posts	Re: Lambda sensors Am not sure. Vag com provides me the following numbers; Controller: 06A 906 018 R Component: 1.8L R4/5VT MOTR HS D06 Is this what you was after?

21-02-2008, 10:10	#5
pang Briskodian Join Date: Feb 2008 Posts: 3 Thanks: 1 Thanked 0 Times in 0 Posts	Re: Lambda sensors Thanks Sebastian. Does this mean that the Lambda sensor is faulty? In group 8, the learned lambda readings do not change...stays at 2.3. The symptoms i am seeing from the car is that the turbo is non existent! (8 - 50mph took 8secs in 2nd gear - maf read 116g/s at 6000rom). Also fuel economy is really poor, 20mpg!

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