help on vag codes

[domg]

hello i got my car read as the emissions light came on and the iddle has started to hunt between 850 and 875 say the rev counter only just moves a little bit when sat at idle

these were the codes

Monday,22,March,2010,19:24:46:56769
VCDS Version: Release 908.1

Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 06F 906 056 CP HW: Hardware No
Component and/or Version: MED9.5.10 00 5627
Software Coding: 0000072
Work Shop Code: WSC 06435 000 00000
Additional Info: 06F907807A NOX 0306130046 004 3608
Additional Info: Geraet 00000
3 Faults Found:

16544 - Oxygen (Lambda) Sensor B2 S2: No Activity
P0160 - 004 - No Signal/Communication - MIL ON
16543 - Oxygen (Lambda) Sensor B2 S2: Response too Slow
P0159 - 004 - No Signal/Communication - MIL ON
17439 - Intake Manifold Tuning Valve (N136): Setpoint Not Reached
P1031 - 004 - No Signal/Communication - Intermittent

Readiness: 0100 0001

help as i have no idea what they mean

i have tried a new lambda sensor and has not worked

thanks

[sjolliff]

Dint know you have already had a new O2 sensor fitted.
Could be the wiring?

[domg]

yes i needed a new exhaust fitting and my mate said he fitted a new one as the old one had melted the coating on the wires or something so fitted new

i called him on the way home see if he could think of anything

Dint know you have already had a new O2 sensor fitted.
Could be the wiring?

[sjolliff]

Did he fit the correct one?
maybe the wires have been melted again?
causing the fault i found

[domg]

i would think he did as he said the other one was fine there is some braket holding the wires up and that had broken so i have got him to rought them unber the heat shield so they can not get melted he said he will check tomorrow for me to se but does not think they have also there were 2 other codes

but any thoughts would help

[sjolliff]

The first 2 codes will be related, the third is a seperate fault.

Hope you get it sorted

[kwempe]

I wouldn't be so sure that the last fault is unrelated as if this flap is jammed it could well screw up the mixture and give some odd lambda readings. I would have all the vacuum pipes etc near this checked for leaks and look at the valve and the sensor on it too. You could try jamming it each way to see if the fault disappears at tickover?

[sjolliff]

True, thats a good point.