2007 A8 3.0 TDI - VCDS questions from a beginner

[Oodoom]

Cheers guys for the advice. Don't think I'll be worrying too much about the engine mount then!

[tc4332]

Adam,
I have something similiar that has not deteriorated during our ownership.

1 Fault Found:
18278 - Transmission Mount Valve 1 (N262)
P1870 - 001 - Open Circuit
Freeze Frame:
RPM: 777 /min
Torque: 46.8 Nm
Speed: 0.0 km/h
Duty Cycle: 1.0 %
Voltage: 14.52 V
Bin. Bits: 00101100
Torque: 202.8 Nm
Temperature: 54.9°C

Readiness: 0 0 0 0 0

I think that it is the sensor that goes faulty rather than the actual mount.

[ainarssems]

There is no sensor in the mount, only valve. At idle valve opens to allow liquid in the mount move more freely and absorb vibration. Under load valve closes to reduce engine movement. I think by default valve is closed so if it has failed you will have more vibration at idle but it's hard to notice. Sometimes it's just corrosion in the plug.

[tc4332]

Ainar,
You are a font of knowledge.
Learning something every day, thanks.

[Oodoom]

Ainar, thank you - what you describe is exactly what is happening with my car. I think I can cope with the slight vibration at idle, next time I have any work done on the engine Ill ask for a price to replace mount.

Thanks again

[ainarssems]

I have not looked at D3 mount prices but for other Audis they are in £250 range each and labour will probably be 1 hrs charge, but could be more if something else gets in the way.