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:
U041B: Invalid Data Received From Exhaust Gas Sensor Module
Is the U041B 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.
U041C: Invalid Data Received From Rocker Arm Control Module "A"
Is the U041C 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.
U041D: Invalid Data Received From Rocker Arm Control Module "B"
Is the U041D 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.
U041E: Invalid Data Received From All Wheel Drive (AWD) Control Module
Is the U041E 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.
U041F: ISO/SAE Reserved
The U041F 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.
U0420: Invalid Data Received From Power Steering Control Module
Is the U0420 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.
U0421: Invalid Data Received From Suspension Control Module "A"
Is the U0421 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.
U0422: Invalid Data Received From Body Control Module (BCM)
Is the U0422 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.
U0423: Invalid Data Received From Instrument Panel Cluster Control
Is the U0423 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.
U0424: Invalid Data Received From HVAC Control Module
Is the U0424 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.