#Audi radio code reader code
If you buy one of those, you can wind up in a situation where you have a check engine light but the code reader comes up with no codes. The cheapest code readers and scan only read P0xxx trouble codes. If the second character is a “2” it’s a generic code that refers to a system that’s not part of the vehicle system setup shown above. And, carmakers can change the meaning for the same code between years and engines. To find the definition of a P1584, you’ll have to know the year, make, model and engine before you can look up the code meaning. However, if the second character is a “1”, then you’re looking at a manufacturer-specific trouble code. So a P0304 means Cylinder 4 Misfire Detected. The third character tells you which vehicle system the code is from.Ġ – Fuel and air metering and auxiliary emission controlsĢ – Fuel and air metering (injector circuit)ĥ – Vehicle speed control and idle control systems So a P0171 mean System Too Lean (Bank 1) for every year, make and model. If the second character is a “0” the code is a generic code and means the same thing across all makes and models. Within those categories are generic and manufacturer-specific trouble codes.
Here are the prefix letters and what they mean:
You have to understand how the trouble codes are arranged before you can decide which code reader or scan tool to buy. sets the standards for generic codes but the carmakers themselves set the definitions for manufacturer-specific codes.
OBDII trouble codes come in many varieties.
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