Hi there please help, my mother has a 2003 Nissan primera (92,000 kms) and has stopped using the car recently because the check engine light has come on, also in the past month I have noticed that the bottom radiator hose is considerably a lot colder than the top hose after a big drive?? me thinking of it being a blocked thermo... anyway mum has taken the car to a auto mechanic for a diagnosis check to be done the the cars computer, the mechanic has called mum about half an hour later saying that he couldn't find what was wrong in the test but identified that the car needs a service, she agreed to that. he called again that same afternoon, and said that the front break pads are worn and need replacing aswell as the rotors (claming that they were metal on metal ( there has been no break issues prior.??? you can probly c whats happing so far............ anyway he called back after that saying that breaks were done and can pick car up the next morning. the following morning he called saying that the car needed a w.o.f and mum had agreed to that, after all this mum has gone and picked the car up, when she started the car mum noticed a difference in the cars start up, it didn't fire up properly with the ease it normally does, mum drove roughly 4 kms and parked up, 20 mins later mum has tried to start car to leave and it hasn't started. the engine was turning and trying to start but it wasn't fireing (no spark or ignition of the cylinders I guess???) she rung mechanic and he asked if mum if she was with AA..... her saying no he drove to mum to asses, (funny thing was he turned up with the computer code reader and two second hand sensors) he ran test and then tells mum that the sensor needs replacing and tried the first of the 2 sensors he brought and the 1st didn't work, he put the second one In causing the car to start, he has told mum that it wont last being second hand.. 3 hours later mum went off to work and the car started for her first time, after work car started, mum has stopped and turnd car off to get petrol, upon starting the car it wouldn't start again, (engine just turning over without ignition) mum was there for 2 hours and without help from a tow truck mum has tried starting it (after2.5 hours) and it has started up..... she drove the car home and now I have traveld all the way here to sort this out.. PLEASE HELP!! should this auto mechanic have knowen of the problem right from the start after running the obd computer code check?? as he is now saying that it could be the cam chain.. im nota happy with his level of professionalism and poor workman ship with fitting second hand sensors to try fix, my question being... has this mechanic knowingly taking my mum for a trip down bills line? would he have knowen from the start if the cam chain was stretching? is there any approach I can take when I go down to his workshop soon