I have a citroen c3 pluriel and the steering is heavy its 2004

Check for worn steering components. IE. worn tie rod ends, worn steering gear box.

hi try their forum more help there.
Citroen C3 Forum

fuse or indicator can or module

worn cv joints
bent drive shafts /out if balance drive shafts
faulty tires
warped disc rotors
wheel bearing failure or out of adjustment
worn suspension and tie rod ends

run the fault codes to check for faulty sensors

Hi dominic

I would like to help you out.
Please have a look at this thread, maybe its what you looking for
http://citroenc3owners.com/diesel-citroen-c3/changing-the-diesel-fuel-filter-t102.html

power steering going hard if I drive at slow speeds for a long time . with that I mean I have a driving school and we do drive less than 10 km/h and revircing in the yard as we do learn people how to do parkings and then the steering do go hard to turn but once we do higher speeds on the roads it get back to normal it is a citroen c3 2004 1.6 16v sx can this be because of the eco mode as it does have a electric power steering

would need a drive to be honest to know whats wrong ,Now in my time cars had no syncro on first or second gear so you had to stop and be stationary to engage first gear which i still do if the cars moving abiet very slowly then i use second but a lot of modern cars like this have out of square engines unlike a old humber or morris with a long stroke engine and a starting handle for a flat battery morning.Now is this not going into gear when moving and ok when stationary or all the time ?

The first thing you must do is have the AC system pressures checked, you may have no refrigerant in the system due to a leak.

Hello
The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPEDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM