AT VDC issue
 

Hi all,
I have a 10yr old 370 with 100k miles.
Recently the car has developed a fault with the transmission (AT).
When I start car all is fine for first 5-10mins then there is a little rev down blip and service light and VDC light come on. After this gear shifts down are fine but up is very clunky, in both D and Manual.
Next day same thing.
I thought there must be a temp issue as it only happens after 5-10mins but now I found that after 20mins driving I stopped, switched off car then on and the VDC fault went and car drove fine for 40mins.
After first time, fault service light stays on always, but I assume this is because there is a fault to be cleared.
After first visit to garage the fault was Cam angle sensor, replaced.
Drove fine for return journey, but next time fault returns.
Back at garage and again CAS is fault again. They are investigating if there is a wiring fault.

Anybody experience anything like this before?

Thanks all.

ok, so they took out the solenoids that divert oil to the cam phasers that advance the cams, apparently they have a little oil mesh and they suspect they need cleaning.
Back in the car and after a 20min journey all was well.
Hopefully when I pick up the car this will be the solution.

So in case this happens to anyone else, cleaning the solenoids would seem to have resolved the issue, 2 days of fault free motoring.

Where are these solenoids located?

Thanks for sharing your experience. Now that these cars are starting to age, its interesting to see where the quirks develop.

On the VTC covers roughly opposite to the cam angle sensors.

Thanks, was able to pull my driver side out enough to see the screen was completely clear. Not bad for 13 yrs. and 100k mi. :tup:

Yep - change the oil correctly, keep the oil clean and it will last a long *** time.

There are also screens on the deck of the heads and on the timing cover.

The cam chain tensioners have screens too.

Mine were all spotless, but I cleaned them with compressed air anyway.