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These fault codes will not be used generally by a majority of the manufacturers. It means that these codes are unique to a specific car make or model.
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These codes are common enough across most manufacturers so that a common code and fault message could be assigned.Ĭodes starting with 1 as the first digit are manufacturer specific or enhanced codes. It means that they are adopted by all cars that follow the OBD2 standard. The first digit in the code will tell you if the code is a generic or manufacturer specific code.Ĭodes starting with 0 as the first digit are generic or global codes.
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The first letter of the code will mark the system related to the trouble code. Network & Vehicle Integration ( U-codes) category covers functions that are shared among computers and systems on the vehicle. Powertrain ( P-codes) category covers functions that include engine, transmission and associated drivetrain accessories. These functions typically include mechanical systems such as brakes, steering and suspension.
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These functions provide the driver with assistance, comfort, convenience, and safety.Ĭhassis ( C-codes) category covers functions that are, generally, outside of the passenger compartment. The OBD2 Trouble Codes are categorised into four different systems.īody ( B-codes) category covers functions that are, generally, inside of the passenger compartment. Format of the OBD2 Trouble Codes System or Category
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This blog post will teach you how to interpret the meaning of the codes. The code will help you to identify and fix the issue within the car.Įach trouble code consists of one letter and four digits, such as P1234. When the vehicle detects an issue, it will activate the corresponding trouble code.Ī vehicle stores the trouble code in it’s memory when it detects a component or system that’s not operating within acceptable limits. Each code corresponds to a fault detected in the car. Editor's note: This post has been updated in March 2020 for accuracy and the latest information.ĭiagnostic Trouble Codes or OBD2 Trouble Codes are codes that the car’s OBD system uses to notify you about an issue.