Engine-Codes.com | All About OBDII Engine Codes
Engine-Codes.com | All About OBDII Engine Codes

U1000

U1000 - Invalid or Missing Data for Primary Id

PDF
U1000 Comments |  Add Comment
Possible causes
- Harness or connectors (CAN communication line is open or shorted)
- ECM
Help with Possible causes What does this mean?
When is the code detected?
When ECM is not transmitting or receiving CAN communication signal of OBD (emission related diagnosis) for 2 seconds or more.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U1000 Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

U1000 Information for specific makes
Need more help?
Do you need more help with the U1000 code? ask a question to our users or search the top hand picked automotive forums for more information


(You will add more details to the question in the next step)
or
Repair Shops Around Your Area
See More...
Need parts?
Need parts to fix this code? Search hundreds of stores at the same time and compare prices


Help Engine-Codes.com
Help us improve Engine-Codes.com. Leave a comment below or tell us if the information above help you fix the code. What are symptoms is your vehicle for the U1000 code? Have you replaced any parts?
Any information is appreciated. Thanks
Engine-Codes.com Comments Powered by Disqus
Google +
Engine Light ON?

The Engine-Codes.com ELM327 WiFi Car Diagnostic connects to your Android phone, iPhone, iPad, or Windows computer from your vehicle.
Ask OBDII Question