Avensis T25 petrol 1.8 - ABS + VSC + TRC OFF

[tangosierra]

Greetings.
Please excuse my poor english.

I have an Avensis 2006. Lately the ABS + VSC + TRC OFF - Lights have come on. Some times they stay on for a long time, and some times they disapear.
I have searched the web, but I don't get any wiser.
Have any of you had this problem? I saw somewhere that it could be a yaw-sensor or even a bad Battery.

Any suggestions will help

[Seb_90]

In my case it was a faulty ignition coil on 3rd cylinder. 

[Avensis tourer]

I am investigating a very similar issue. When it happened the first time, I was travelling, so I decided to call the AA to keep my hands clean. The main fault code was connected to a parking electric brake, possibly a sticking calliper. It was the original diagnosis given by the AA technician. I was unsure about it, but I didn't argue. The AA technician cleared the codes and was okay for the next 400 miles. "The Christmas tree" on my dashboard returned while driving on a bit of soft land. It disappeared again after a few hours. I have connected my Delphi interface, and the new code was connected to the ignition coil on 3rd cylinder, too. I have investigated it a bit and spotted a broken clip on it. My next step is to change a coil pack and then change the pin. I hope it gets it sorted. Otherwise, it will be complicated as codes are present only sometimes.