U0235 Fault Code

Long Description

Fault code U0235 is a communication-related code that indicates that there has been a loss of communication with the cruise control front distance range sensor.

The cruise control front distance system is a safety feature used in some modern cars. It is responsible for continuously monitoring a number of parameters in front of the vehicle while driving.

It is typically found behind the grille in the front bumper.

This is one of the primary feedback systems that keep the vehicle at a maintained speed.

This sensor sends information throughout the controller area network (CAN) bus, particularly to modules like the cruise control module and powertrain control module.

This code can only be logged from vehicles that have both cruise control systems and front distance range sensors for these systems. Audi, Toyota, Volkswagen, and Lexus are among the most common manufacturers to suffer from this code.

Other Signs of This Problem

Because this system will not always be in use, it can be difficult to pick up on any additional signs of the problem. Of course, this is not true for drivers that implement the cruise control system often.

One of the most obvious signs will be the presence of the Check Engine light on the dashboard.

It is also very likely that the cruise control system will not start up at all if this code is logged. This is because it cannot safely do so.

There may be additional fault codes logged that can help determine the cause of the issue. These can be codes like U0100, U0104, and U0305.

What Could Be The Problem?

The causes for this communication-related fault code are some of the fairly common ones.

The most likely cause is that the cruise control front distance range sensor itself or its control module is faulty. Similarly, there may be an electrical fault in the sensor circuit or the control module circuit.

It is also possible that there is an electrical issue within the CAN bus. This can include both an open circuit, as well as either a short-to-ground or short-to-power.

Fixes

Any of the fixes for a communication-related module can be extensive due to how complex these systems have become.

One of the first steps should be to check the front distance range sensor itself. If it is defective, it needs to be replaced.

If there are any electrical faults in the sensor circuit like damaged wires or loose connections, these need to be fixed accordingly.

The CAN bus network should be inspected for any electrical issues. Both the positive and negative wires need to be checked.

If it can be determined that the cruise control front distance range sensor control module is faulty, it should be replaced.

Seriousness

Fault code U0235 ranks fairly low in terms of severity. It does not pose a huge risk to the performance of the vehicle. However, it can typically cause the cruise control system to become inoperable.

If the cruise control system is often used, it is a good idea to have this issue fixed as soon as possible.