check the oil first (gearbox) or get a dealer to

Mick,

I have an almost identical problem with a 406.
Happened a couple of times on Sunday and was fine when restarted. I've had
it in to Peugeot cos it was going in for service anyway and, surprise
surprise, they can find nothing wrong. But, they can find nothing right!
No communication from the engine ECU to the gearbox ECU. And such is the
quality of peugeot techies that if the laptop doesn't give them the
answer, they're stumped. Basically the gearbox and ecu are functioning
fine but may not forever. I have the part number from peaugeot for a
replacement gearbox ECU (?650 +vat) and they want me to order it to see if
that's the problem. OK then... They did say that pettern ECUs exist, but I
can't find them. Does anybody know where I could get a recon ECU for a
gearbox? Please keep me updated on your problem, as we speak my car is
running fine.

Matt