Trouble code U0155: What does it mean, and how to solve this?

The OBD 2 scanner is used to find the problem you face while owning a car. So you need to know about some code to find the issue related to which part of the vehicle. Just like that, you also see the code U0155 on the car screen. And this problem is associated with the communication problem with the instrument panel cluster or IPC control module.

What is the reason for this trouble code U0155?

The trouble code U0155 is a generic communication problem. This problem is associated with the communication trout between the Instrument Panel Code (IPC) module and another control module. This module is mainly used to communicate with all the control modules with Controller Area Network or CAN bus system. Without the CAN bus system, no control module can’t work. That means they can’t exchange the information between all modules. With that, your scanner is also unable to scan any problem dealing with your vehicle. That’s why this problem is known as the CAN bus fault. So the code U0155 shows the communication problem with IPC or PCM with another control module.

What are the symptoms of code U0155?

There are many symptoms when an engine faces U0155, this trouble code. The symptoms are:u0155 lost communication with instrument panel cluster (ipc) control module

  • MIL or Malfunction Indicator is “ON,”
  • In the instrument panel and clusters, all indicator lights are illuminated,
  • No indicator lights are on in the instrument panel or cluster.

What is the reason behind the trouble with U0155?

There is some common cause behind the issue of U0155. Like:

  • Communication trouble between the module,
  • CAN bus system fault,
  • Faulty Instrument Panel Cluster Control Module,
  • Short or open circuit problem in CAN bus,
  • The poor electrical connection in the IPC control module,
  • Open or short harness system in the IPC control module.

How to diagnose the trouble code U0155?

To diagnose the trouble code, there are some steps you need to take. Like:

  • Examine the communication trouble between modules,
  • Check the battery voltage. Is it working correctly or not?
  • The communication problem between PCM and IPC.
  • Examine the DTC history and notice a current or former issue you face.
  • Check the wiring and connectors, whether it’s connected correctly or not.
  • Diagnose any problem you found using freeze frame data and check this related system.

Some common mistakes you face while diagnosis the trouble code U0155:

Many times, you also make mistakes in finding the problem quickly. Like:

  • Use faulty diagnostic test equipment,
  • Unable to check freeze frame data and also check the DTCs only,
  • Ignore the proper repair guidance,
  • Avoid using a factory shop manual.

How to Fix the U0155 OBD Code?

We talk all about the details of trouble code U0155. Now you need to repair this problem. You also need to follow some steps to solve the trouble, like:

  • Repair or replace the faulty IPC,
  • Replace the damaged wires,
  • Repair any corrosion in the connection,
  • Clean and correct the battery terminals.
  • If still, you cannot remove the problem, then use the TSBs to find the reason for the problem. Because the technical service bulletins or TSBs have all the details of your car.

How important is the trouble code U0155 to fix it?

There are many issues behind the problem of U0155 in your car. If the bridge of information transfer no longer exists, there is a fault in the control module. The control module is not communicated with another module with PCM as well. The loss of connection between the module and the PCM failed to monitor the operation of a significant control model that your car depends on operating efficiently. So it does not create problems when you drive the vehicle. But I’ll suggest you solve the issue as soon as possible. And if you are unable to fix this problem by yourself, you need the help of an automotive technician.

Kevin Nicholas is an automotive technician who is a genius at software and hardware-related issues. He manually tested more than a hundred OBD scanners and gave his honest opinion on whether the device was worth the money or not. His in-depth OBD review articles help people choose the right product, whether it is a European, American, or Asian vehicle. He completed his Automotive Specialized Training Course at Universal Technical Institute and has more than 15 years of experience in the field.

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