Seriously how can you ask such a question? Any mechanic can hook their OBD II equipment to your engine and print out the error code. But not many know what to do regarding the error code (I am saying this from experience). That is why the originator of the thread was asking for a "reliable/good diagnostics guy", one who can correctly interpret the error code (ie P0191 Fuel Rail Pressure Sensor Circuit Range/Performance) and make the correct recommendation to solve the problem. Otherwise he could have walked/driven to Grogon and asked the first mechanic he saw with an OBD II to sort him out. Generating the error code is only half the story, in fact only 1/8th of the story. You need a good mechanic, like my guy, to determine (from that info/data) which parts/systems are faulty (because the code doesn't scream that it is the fuel pump that is faulty, its for him to decipher that from the info) and take corrective action to ensure that your car is back to 100% performance.