Engine Trouble Codes

Welcome to Engine Trouble Codes is your one-stop resource for everything related to engine trouble codes and diagnostics. Our mission is to empower vehicle owners and technicians with the knowledge, tools, and support needed to accurately diagnose and repair engine issues, ensuring a safe and smooth driving experience. Dive into our comprehensive code library, explore detailed troubleshooting guides, discover the best diagnostic tools, and connect with our community of automotive experts. Together, we'll help you keep your vehicle in peak condition.

EngineTroubleCode.com listed ODB and ODB-II codes with their meanings, reasons and fix ways. These engine trouble codes divided 4 parts : Diagnostic Body (B) Trouble Code , Diagnostic Network (U) Trouble Code ,Diagnostic Chassis (C) Trouble Code and Diagnostic Powertrain (P) Trouble Code.Explore our extensive library of engine trouble codes, covering all major makes and models. Each code is accompanied by a detailed description, possible causes, and recommended diagnostic procedures to help you identify and fix issues efficiently.

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A light on the dash signifies that your car's engine control module, or ECM, has logged a problem. This is logged as a engine trouble code, and the codes are somewhat mysterious. While the list of codes below isn't comprehensive, it's a decent place to start learning about what could be wrong with your vehicle whenever a particular code is set.

Engine Trouble Code Logic :

1st digit
P = Powertrain
B = Body
C = Chassis
U = Network

2nd digit
0 = Standard
1 = Manufacturer specific

3rd digit
1 = Emission management
2 = Injector circuit
3 = Ignition
4 = Auxiliary emission
5 = Vehicle speed & idle control
6 = Computer & output circuit
7 = Transmission

These fault codes will appear on a two digit display found under the passenger seat. Note that although the display can indicate fault codes up to 99 not all numbers are valid codes. You read the codes by removing the side panel of the seat base or looking at the display under the back of the seat.

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Browse our step-by-step troubleshooting guides designed for both beginners and experienced mechanics. Learn how to diagnose, repair, and prevent common engine problems, ensuring your vehicle's optimal performance and longevity.

Generic and manufacturer specific codes

The first digit in the code will tell you if the code is a generic or manufacturer specific code. Codes starting with 0 as the first digit are generic or global codes. It means that they are adopted by all cars that follow the OBD2 standard. These codes are common enough across most manufacturers so that a common code and fault message could be assigned.

Codes starting with 1 as the first digit are manufacturer specific or enhanced codes. It means that these codes are unique to a specific car make or model. These fault codes will not be used generally by a majority of the manufacturers. The first digit might be also 2 or 3. In this case the type depends on the system. B2xxx and C2xxx codes are manufacturer controlled while B3xxx and C3xxx codes are reserved at the moment. P2xxx codes are generic codes while P3xxx codes are manufacturer controlled. U2xxx codes are manufacturer controller as well as U3xxx codes.

	Example: 0120

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Engine Trouble Codes

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Generic and manufacturer specific codes