engine malfunction - help

[Punter]

Drove 3 hrs down to the south coast on Saturday - everything fine. Sunday morning, started the car - small engine light and large engine light came on immediately accompanied by a large cloud of white(ish) smoke from the exhausts. Let it run for 5 mins, switched off. Left it for 5 mins. Started it up again - all completely normal. Drove 3 hrs home, no issues at all. Any thoughts? Thanks.

[Busterboo]

Thoughts? Yes.

1 Take it to your AD/indy for a diagnostic.
2 The early morning weather's been very humid recently. Occasionally, a strange phenomenon can happen, where the intake & exhaust systems can be 'flooded' with cold, heavy, wet air. On start-up, this produces a large quantity of vapour and confuses the sensors.

[Punter]

Thanks buster. That sounds about right. Its usually garaged, and it was a chilly damp morning. Already booked my indy.