Help with error code

01-03-2007, 19:18 Subject: Help with error code

Hello everyone,

I have the following error.
T4 Bus 2.5L TDI (ACV)

Error code: 16885.
Vehicle speed signal: implausible signal.

Possible causes.
No signal from the speed sensor (G22).

The speedometer isn't working, but the tachometer and everything else is fine.

what should I watch, where should I start??

Thank you for the help in advance.

01-03-2007, 19:24 Subject: Help with error code

Look at the back of the gearbox from below, meaning from back to front.
Then you should see one sensor on the right and one on the left of the transmission.

Critters often get into them and chew on the wires.

01-03-2007, 19:37 Subject: Help with error code

Okay, I'll take a look.

Okay, I forgot to mention that it's a T4 with a 2.5L TDI engine (ACV).

Is that exactly the same?

01-03-2007, 20:09 Subject: Help with error code

Oops... I was basing my assumptions on the Passat V6 TDI.

If I understand correctly, the T4 transmission has two sensors, one on the side and one on top... it must be the one on top. (Part number: 095 927 321c?)

It's a bit surprising, though, that the DZM is still working.

01-03-2007, 20:17 Subject: Help with error code

The sensor with the number 095 927 321 C is a speed sensor.

I'll take a look and see if the cable is disconnected.

Do you have any other ideas about what it could be?

Thank you for the helpful tip.