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Fault message

Communicates data and commands between vehicle parts.

Costs

Every car issue can be caused by different things. Here are the most common ones

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Most Expensive

Moderate costs

Moderate costs

Cheapest case

Discussions

User of our Carly Community asked the following questions regarding that fault:

Smart Mechanic

Details

Probability

Based on the values and symptoms you have entered, a crude estimation of the probability of this problem can be made

high-probability

HIGH

Typical consequences

If this defect is detected, it may lead to the following problems:

  • Malfunction of the vehicle electronics

Function of the bus system

Modern passenger cars are increasingly equipped with electronic systems.Often, mid- and luxury-class vehicles have 50 control units or more.Since most of these systems have to communicate with each other, conventional wiring is hardly possible anymore, as this would lead to gigantically long cable harnesses.

Since installation space in a vehicle is limited and the focus is on weight reduction, the conventional wiring harness has been replaced by a so-called bus system.In the automotive sector, the CAN bus system (Controller Area Network), which is used for data transmission between the various components and control units, has become established.