Citroen C3 ac fault


With the recent heat wave we have had the expected influx of customers with air conditioning faults, it is usually a case of refilling or top up of  refrigerant to rectify the problem but this case was different.  This Citroen climate control had not functioned for around 18 months and after the customer spending over £250 on unnecessary repairs at another garage the fault still remained. I started with a diagnostic interrogation of all modules that influence the ac, bsi, climate control, and pcm, numerous error codes were read so i  began with a fault clear broadcast. After studying live data in various modules i established refrigerant pressure was ok and that the various control circuits were functional. However i …

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Ford Tourneo 2014

We were approached by a local coach company and asked to investigate an engine management fault with their 2014 2.2 diesel Tourneo    minibus. After driving the vehicle approx 5 miles the engine malfunction lamp would illuminate and default function deployed.  The companies own mechanics had already fitted a new maf (mass air flow) sensor after retrieving an error code associated with that component (a mistake we see quite often)                                                                                                     …

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BMW 530 non start fault

A BMW 530 arrived at our workshop on the back of a recovery vehicle recently and we were asked to investigate a non-start fault. The engine would crank but refused to start. I began by running a diagnostic check of the DDE module. Amongst numerous error codes was 4A63 [EWS tampering] . This was not the first time i had encountered this fault, so i was confident this was the cause of the problem. This code indicates a synchronisation fault between the CAS [car access system] and the DDE [digital diesel electronics]. A quick look at the DDE synchronisation status confirmed my suspicions. Rectification requires realignment of the DDE and CAS modules using the Autologic diagnostic tool. Once carried out …

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