How To:Efficient Fault Diagnosis.Interpreting Fault codes. Diagnostics 2. TECHNICAL BULLETIN To talk with a technical expert on this subject, call 00442078586890 or email [email protected]With diagnostics becoming more and more essential to a garages survival, it is important that the diagnostic procedure is as efficient as possible. Many people use fault codes as the only diagnosis, and there is a lot to be learned from fault codes, however more in depth diagnosis is often necessary. This bulletin covers fault codes, but also shows a logical path to follow to resolve the concern. It’s all very well getting detailed fault codes and data but this information is only useful if you understand it. One problem associated with fault codes and the messages with those codes is trying to interpret exactly what they mean. A technician can learn a lot about a fault from the generated code that can be used to more accurately pin point the fault and ultimately save the technician time in diagnosis and rectification of the concern. Fault codes are broken down into the following sections, each of which relates to a specific system or sub-system. P = Powertrain. B = Body. C = Chassis. U = Communication. For powertrain codes the following applies. P0XXX and P2XXX are generic (NOT manufacturer specific) codes, P1XXX and P3XXX are manufacturer specific codes. For body, chassis and communication codes the following applies. B0XXX and B3XXX are generic (NOT manufacturer specific) codes. B1XXX and B2XXX are manufacturer specific codes. Page 1
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