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What does the U112100 fault code mean?

1 Answers

DelVanessa

07/29/25 6:57pm

U112100 fault code indicates a data bus loss. Here is the specific introduction to automotive fault codes: 1. Meaning: Indicates the monitored fault system. P stands for powertrain; B stands for body system; C stands for chassis system; U stands for network or data communication transmission system fault code. 2. The first digit: It is a generic code (for all vehicle manufacturers) or a manufacturer-specific code. For example: 0 refers to a general code, 1 refers to a manufacturer-specific code. General Motors in the United States has specific numeric type codes to assist in diagnosing vehicle technical conditions. 3. The second digit: Indicates the type of affected fault system, with numbers ranging from 1-7: 1 for fuel and air metering system; 2 for fuel and air metering system (specifically for injection system circuit malfunction); 3 for ignition system or misfire monitoring system; 4 for auxiliary emission system; 5 for speed control and idle control system; 6 for computer output line system; 7 for transmission.

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