Generic Codes
Generic OBD2 codes are standardized codes that apply to all cars that are OBD2 compliant, regardless of the make or model.
Our collection of articles on this page provides a wealth of information about these codes, going beyond just an explanation of what they mean. We analyze each code in detail, providing technical explanations, common causes, symptoms to look out for, and recommended solutions for each issue.
So why wait? Start exploring now!
In a hurry? Quickly jump to the code you're facing:
U00FD: ISO/SAE Reserved
The U00FD code is a generic ISO/SAE Reserved code that may appear in your vehicle's diagnostic system. Read on to learn more about it and what you should do to deal with it.
U00FE: ISO/SAE Reserved
The U00FE code is a generic ISO/SAE Reserved code that may appear in your vehicle's diagnostic system. Read on to learn more about it and what you should do to deal with it.
U00FF: ISO/SAE Reserved
The U00FF code is a generic ISO/SAE Reserved code that may appear in your vehicle's diagnostic system. Read on to learn more about it and what you should do to deal with it.
U0100: Lost Communication With ECM/PCM "A"
Is the U0100 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0101: Lost Communication with Transmission Control Module (TCM)
Is the U0101 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0102: Lost Communication with Transfer Case Control Module (TCCM)
Is the U0102 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0103: Lost Communication with Gear Shift Control (GSC) Module
Is the U0103 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0104: Lost Communication with Cruise Control Module (CCM)
Is the U0104 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0105: Lost Communication with Fuel Injector Control Module (FICM)
Is the U0105 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.
U0106: Lost Communication with Glow Plug Control Module (GPCM)
Is the U0106 code causing communication issues in your vehicle? Read on to learn how to deal with this communication network problem and get your vehicle back on the road.