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Meaning of error codes: example made on Dodge

Model: Dodge Dodge Various
Part: Checks and maintenance

In this video, we are explained how error codes are encoded: since the codes are closely linked to each brand, in the video we give an example on Dodge: following the OBD2 protocol we divide the car's electrical system into four parts: the first letter of the code identifies the main system of the vehicle, where the failure occurred: P=Powertrain (engine, transmission, and related systems) C=Chassis (frame, brakes, suspension, and steering) B=Body (body, airbags, climate, electronic systems) U=User Network (communication networks between electronic control units). The second character indicates the type of code: it is a digit that specifies if the code is standardized or manufacturer-specific 0 is a generic code; 1 is a manufacturer-specific code 2 is a generic SAE or ISO standard code for Powertrain codes while for Chassis, Body, and Network codes it indicates a manufacturer-specific code: the third character is a digit that identifies the specific subsystem within the main system, and varies depending on the first letter of the code. The fourth and fifth characters specify the exact fault and are digits from 00 to 99 which, combined, provide precise information on the specific fault within the subsystem.

Posted on 13 November 2025 by ScegliAuto

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