OBD 2 TROUBLE CODES - CAR DIAGNOSTIC TOOL

The Check Engine Light indicates a trouble code stored in the car’s computer and can indicate a number of issues.

Standard or generic fault codes are a list of codes common to all manufacturers.

This list of faults, also called DTC (for Data Trouble Code) has been defined so that any diagnostic device can read and decode them.

Diagnostic trouble codes (DTC) are automotive computer codes stored by the on-board computer diagnostic system (OBD) in your vehicle. There are literally hundreds of different codes a Check Engine Light can represent. While that sounds daunting, with a little patience, tackling basic diagnostics will give you useful knowledge about your vehicle and will also allow that Check Engine Light to do what it is really supposed to do: be your guide.

There are four possible letters that can be displayed in the first section.

The letter “P” indicates powertrain-related codes such as those involving the engine or the transmission and their sensors. Typically, “P” codes are the only ones that will illuminate the Check Engine Light.

The letter “B” indicates a body code, which means that it relates to a body system such as the airbags.

The letter “C” indicates a chassis code, used for systems such as the anti-lock brakes.

The letter “U” indicates network codes which are used for problems like module failures and losses of communication.

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