2007 Peugeot 207 headlamps flash on and off

Get a "Global Scan"
done.
This scans for any faults in the vehicle systems.
EVERYTHING electrical.

Can I ask your personal opinion,what do you think it sounds like,just so I have an idea when take it to be fixed,thank you very much in advance :)

As suggested by the previous poster , you really need to get it scanned .I would think the different faults are unconnected especially with the anti polution warning . The parking sensors could be a faulty switch , check reverse lights are working o.k , or just a sensor .But other possible causes and would only be guessing , especially with anti pollution ..

Thank you so much for your help and advice :)

|'m not trying to be awkward.
But a global scan is where I'd start.
Where I would not start is guessing.
If you had brought your car into me to be fixed you do not want to pay for my guesses.
You want an estimate for repair.
Electrics on French cars can be a law unto themselves.
It could be just a faulty stalk switch,
or not.
So I scan for faults then move on from there to test dependent on results.
But a scan however much it costs is really the cheapest option to start with.
The other option has been called "parts darts"
where you throw cash at it in the hope you get it fixed.
You may get lucky and it fixes it but don't count on it.
I recall a Peug that came in to me and I just didn't want to guess how much he'd spent on it.
Many shiney new parts.
And the end result from my testing was a wiring repair.
in the engine bay fuse/relay box.
The guy was actually furious.
Not at me but at the previous work done.
I try to work to a system,
First law is don't jump to conclusions.
Second law is scan it.

:) perfect thankyou,we could do with a few more people where I live like you,straight to the point and honest,thanks again its much appreciated.