When you have done your checks, pull the fuse to the ecu or disconnect the battery for an hour or so to reset the fault codes in the ecu. (If you disconnect the battery, remember you will loose your radio code as well). This will clear the fault, but if it still exists then it will flag up again and the vehicle will drop back into 'safe or limp home mode' which will reduce power and increase consumption. I wish I had known this £750 earlier.

I ran a granada diesel for many years and only changed a glow plug. Scrapped it when I retired and bought an 02 mondeo, 87k, on the strength of the granada. Less than one year later, my glow plug light started flashing intermittently; eventually, one morning it failed to start, I had it towed to the local ford dealer, who for £740 changed injector number 2 (fault code P2337), changed the fuel filter, the camshaft sensor and cleaned an earth point. My problem is this - do they actually know what the fault was - I don't think they would check the injector or the relay, they threw mud at it. Does anyone have knowledge/experience of home OBD testers please. ******************************************************************* Mondeo TDCi Injector problems. The characteristics of each injector are programmed into the computer. Now, as the miles build up so does the crap in the injectors and hence their physical characteristics change, but not so the coding in the computer. Eventually the two get completely out of sync, the physical and the logical, and the computer starts flashing fault warnings. I have had only one injector changed and I am now busily engaged in cleaning out my system in the hope that I can avert further problems. I've also heard it blamed on the sulphur content in the fuel; the base of the injector gets hammered due to the lack of lubrication. But for me the computer one is so logical. ********************************************************************* Wynn's have now brought out a diesel injector cleaner specifically formulated for common rail engines. UKOBD supply testers that they claim will work - I have not purchased one. I have no experience of them, the testers that is. Injector sockets are available for £10/12 *********************************************************************** After consideration I think I paid £740 to have a sensor changed. A camshaft sensor must basically detect four positions, the computer will know the last position and by inference the one coming up. Now if the sensor breaks down, the computer will log the position (injector) at which the failure was detected. The fault diagnosis in the manual will give everything in the chain down to the injector last recorded. Our trusty Ford mechanic will look in the book and will change everything in the line down to and including the last item in the chain (injector). The guy paying for it, would test/change the cheap easy items first (sensor) and try it; would the trusty Ford mechanic, I think not. An intermittent camshaft sensor as well as a clogged up injector would probably cause the fault light to come on every now and again. But, when the camshaft sensor totally fails the engine stops; that sensor has to be signaling inlet and exhaust times to the system. This was the first time in my life I've taken a car to a garage to be fixed - never again.