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:
U003E: ISO/SAE Reserved
The U003E 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.
U003F: ISO/SAE Reserved
The U003F 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.
U0040: Vehicle Communication Bus B (+) Low
Is the U0040 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.
U0041: Vehicle Communication Bus B (+) High
Is the U0041 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.
U0042: Vehicle Communication Bus B (-) Open
Is the U0042 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.
U0043: Vehicle Communication Bus B (-) Low
Is the U0043 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.
U0044: Vehicle Communication Bus B (-) High/p>
Is the U0044 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.
U0045: Vehicle Communication Bus B (-) shorted to Bus B (+)
Is the U0045 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.
U0046: Vehicle Communication Bus C
Is the U0046 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.
U0047: Vehicle Communication Bus C Performance
Is the U0047 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.