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Meaning of code u0100 on an rx8 - 2004 Mazda RX-8

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Posted on Jan 02, 2017

adegboyega
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SOURCE: what do the code u0100 mean on dodge charger 2006

Hi,


The U0100 code means there is Loss in communication with the ECM/PCM,which might be as a result of one of the following reasons listed below.

1. You had flash downloads applied to your vehicle. Many erroneous DTC codes are generated during flashing and should be cleared after flashing 2. You disconnected/reconnected computers in the car with the power still applied 3. An interruption (break or short) in the CAN network caused communication errors.


a simple software update will help you resolve the issue.




Good luck,

Posted on Aug 28, 2010

  • 106 Answers

SOURCE: I had my 2004 Mazda

Codes that begin with the letter U are always communication fault codes between modules in a CAN system. They are basically to be ignored unless a problem is occuring. This is because all of the control modules in your car ( and there are a bunch of them ) are all communicating to each other and sending information between each other on one set of wires called a "twisted pair" Due to the high volume of infomation being sent and received there is the invevitable time when a message will be sent from one module to another and it is lost or not responded to in a timely manner (meaning in milliseconds) When this occurs then a U0100 or other comm fault code is stored.

Posted on May 20, 2011

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1: check all fuses. using and ohm meter (restance low range) for 0 ohms.
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I had my 2004 Mazda Rx8 get an Engine Diagonistic@ Advance Auto & I got this code which I cannot decipher U0100-lost comm. with Engine control/Power Train Engine control Mod A.Could yiu please explain...


Codes that begin with the letter U are always communication fault codes between modules in a CAN system. They are basically to be ignored unless a problem is occuring. This is because all of the control modules in your car ( and there are a bunch of them ) are all communicating to each other and sending information between each other on one set of wires called a "twisted pair" Due to the high volume of infomation being sent and received there is the invevitable time when a message will be sent from one module to another and it is lost or not responded to in a timely manner (meaning in milliseconds) When this occurs then a U0100 or other comm fault code is stored.

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1 Answer

Im looking for the definition to code U0100.


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What do the code u0100 mean on dodge charger 2006


Hi,


The U0100 code means there is Loss in communication with the ECM/PCM,which might be as a result of one of the following reasons listed below.

1. You had flash downloads applied to your vehicle. Many erroneous DTC codes are generated during flashing and should be cleared after flashing 2. You disconnected/reconnected computers in the car with the power still applied 3. An interruption (break or short) in the CAN network caused communication errors.


a simple software update will help you resolve the issue.




Good luck,

Aug 28, 2010 | 2006 Dodge Charger

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