Buzzing on acceleration peugeot 207cc - 2007 Peugeot 207 1.4

You need an auto electrician to connect a pro grade scan tool computer and it will diagnose codes and communication errors that a cheap tool can't.

Peugeot depollution system error

https://www.google.com/search?q=depollution+sytem+faulty

..

short in relay or harness

Try Fairy Liquid.

what kind of fault their are multi types

No such fault, there are fault codes for problems in the pollution control system.

will need to check the front area can be brake related --debris stuck --suspension damage --

SPECULATION only... because Peugeots were not
commercially imported to the USA in 2008... BUT

TYPICALLY you must empty & drop the
"GAS TANK" to access the sender unit
(fuel - pump)...

It is a big enough job where it is certainly reasonable
to lift your rear mats to LOOK & see if access is available
(through the car floor) with the FUEL TANK in place...

http://www.mister-auto.co.uk/en/sender-unit-fuel-tank/peugeot-207-wa-wc-1-6-hdi-90hp_v19352_g605.html

I did check a Peugeot FORUM and an UNANSWERED
question remains...

Does any one know how to remove the BIG NUT that
holds the fuel sender in place??
207 fuel sender removal Peugeot 307 forum Peugeot Central

My guess = BIG WRENCH (spanner)...
Sadly I have found no AMERICAN companies
that list significant PEUGEOT parts or tools from
1991 to 2009...

Hope this helps.

My suggestion would be to check the gage FIRST.

Carnac the Magnificent

I have changed my coolant temp sensor but my 207cc still reads hot so im going to need to change the thermostat housing

try Peugeot forum