# Diagnostic Trouble Code
Transmission and TCU Module DTC Codes Overview
Transmission-related Diagnostic Trouble Codes (DTCs) focus on faults within the transmission control system
Safety and Assistance DTC Codes Overview
Safety and driver assistance-related Diagnostic Trouble Codes (DTCs) provide critical insights into malfunctions in systems like airbags
Boost System DTC Codes Overview
Boost system-related DTC codes are critical for identifying problems in turbocharged and supercharged engines.
The Role of Datalogs and DTC
Tuners must manage hardware connections and use tools for Datalogs and DTCs to optimize performance and troubleshoot issues.
Intake and Cooling System DTC Codes Overview
Intake and cooling system-related Diagnostic Trouble Codes (DTCs) are crucial for diagnosing issues that affect airflow, engine temperature, and cooling efficiency.
ECU Internal Error DTC Codes Overview
ECU internal error DTC codes indicate malfunctions within the Engine Control Unit (ECU), often involving memory corruption, faulty processors, or timing discrepancies.
Sensor and Communication Module DTC Codes Overview
Sensor and communication module-related Diagnostic Trouble Codes (DTCs) identify faults within a vehicle’s communication network.
Powertrain-Related DTC Codes Overview
This article summarizes common Powertrain-related DTCs for diagnosing engine and transmission issues across various vehicle brands.
Emissions and Fuel System DTC Codes Overview
Emissions and fuel system-related DTCs highlight issues within a vehicle's air-fuel mixture, fuel delivery systems, or emission control components.
Electrical System DTC Codes Overview
Electrical system DTC codes identify issues within the vehicle's electrical circuits and components
