Fitted the fabled "Caterman box" to my 150 Zafira and then set off cross France for our hols. Fully loaded, roof box, wife, kids, bikes on the back etc, car felt good and strong on the autoroute. Once down in the South out came all the stuff and the real increase could be felt... Cool....
'Bout a week into the holiday had a little "play" with a bloke in a 206. All was good until I slowed down a bit 30-40 miles later when the car dropped into limp home mode and the spanner warning light came on. Pulled over and fiddled with the connections a bit, I hadn't removed the tabs under the plug when I'd fitted it so thought that might be the problem. No joy, warning light stayed on, stayed in limp home mode too. Finally took the box off. Warning light stayed on but went back to (semi) full power.
Guessing that the warning light would stay on until reset at the stealers back at our villa I removed the extra lugs on the plug and tried refitting it. No joy... Dropped straight back into limp home.
Anyway 2 days later the warning light went out of it's own accord. Ever the optimist I refitted the box and no problems since...! 1000 miles since and although I watch for the light religiously no problems...
My first thought was a dodgy connection caused by the plug not fitting properly but a bit of work with the leatherman seemed to sort that. Now I'm left with the DPF regenerating and not being happy with the extra fuel the box was pumping through? I did tell T-Tuning about the DPF but I guess it's possible I was sent the wrong one.