Peugeot 207 fan keeps coming on - 2007 Peugeot 207 1.4

You could possibly have a faulty fan switch

vehicle in limp mode need to have scanned for problem

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

You need to have a OBD2 fault code test performed to determine what codes are present in memory, based on that test you do the prescribed diagnostics testing.

See this site for possible solution:
How to reprogram Peugeot 207 car key after changing plip battery Yahoo...

How to reprogram Peugeot 207 car key after changing plip battery Yahoo...

There isn't one, its electric power steering on that model . If the steering has got heavy check the appropriate fuse to make sure that hasn't blown, they should be listed in your handbook. If it has, replace it but keep an eye on it as fuses don't normally blow for nothing. If it hasn't blown then the motor has probably burnt out but that normally blows the fuse.

sound like engine coolant temperature sensor faulty also coolant level too low.

There is no such thing.

If youre refering to Antipolution warning coming up on display:

Sadly a common fault with 207s is random fault warnings coming up on the display.

If it's a real fault, then you should notice a fall off of performance and this indicates a trip to your garage to get it fixed.

If the fault comes and goes, or there is no loss of performance, do what most 207 drivers do and ignore it !

hallo
remove two bolts from behind
Marko