Trouble Code U0415: Communication problem in ABS control module

Safety is the first thing for every car owner, driver, and passenger. An Onboard diagnostic scanner attaches to every vehicle to avoid some problems and accidents. But this scanner uses some code to show the problem with your car in the Controller Area bus system. The trouble code U0415 is mainly used to get invalid data from the Anti-lock brake system or ABS control module. Here we give you the complete details of this trouble code.

Meaning of the U0415 Code

The trouble code U0415 is a generic trouble code. This communication problem occurs when the PCM/ECM detects the ABS module signal voltage input. It is invalid, impulsive, or otherwise. It falls outside of the expected range. This ABS control module differentiates the rotational speed of every wheel and transmits the information to the Powertrain control module when the ABS is working correctly. This control module also shares data with other modules like the stability and Traction Control Module.

The Powertrain Control Module monitors the Controller Area Network bus to ensure that the message sent to the Transmission Control Module is constantly fixed. If the TCM cannot connect with the Anti-Lock Brake system module within a specific time, the DTC of U0415 of the OBD2 scanner code will be triggered.anti lock brake control module repair

Symptoms and Causes:

Some common symptoms are related to the trouble code U0415. Like:

  • Check the illuminated light of the engine.
  • Malfunction of Anti-lock Brake system (ABS).


Some typical reasons for the trouble code U0415 are:

  • Damaged wiring of the and/or connectors like damaged, shorted, burnt, disconnected, or corrosion in the wire.
  • There is a fault with one or more Wheel Speed Sensors. But some extra malfunction codes are displayed in this trouble code.
  • There is a Damaged or faulty pump function of the ABS pumps.
  • The ABS/Anti-lock Brake System Control module also has a defect.

Diagnosis OBD code U0415:

You need to follow some steps to diagnose the trouble code U0415. The step is:

  • At the first scan, the ECM codes and inspect the freeze frame data for failure.
  • Examine all the wiring and connectors.
  • Then test the wheel speed sensors for resistance and continuity.
  • Look over the voltage on the power and ground circuits,
  • From the ABS pump motor, calculate the current draw.
  • If necessary, remove or test or replace the ABC control module.

Mistake in diagnosis:

Many times you make some mistakes in the diagnosis of the problem. And this problem leads you to misdiagnosis, and sometimes, it also creates a mess, and you need extra time with money. The mistake you make when you examine the issue:

  • Forget to check the wheel speed sensors for resistance and continuity,
  • Misread in visual inspecting all the wiring and connectors,
  • Forget to measure the current draw on the ABS pump motor,
  • Mistakenly replaced the wiring parts.
  • After repairs are made, forget to clear the code and perform information.

How to fix code U0415?

The repair process for this trouble code U0415 is as follows:

  • First, locate the faulty parts like wiring, connectors, or hoses. Then repair the fault and, if needed, replace the part.
  • If you find trouble with the Wheel speed sensors, then replace them.
  • If the problem occurs with the ABS control module, then replace this.
  • After finishing any repairmen, clear all the codes from memory and then perform a test drive. If you get the trouble code again, the problem is not solved, and you need to consult a technician. 

The seriousness of this trouble code U0415:

The trouble code U0415 is related to the anti-lock brake system. When the ABS control module fails to communicate with other control modules, you notice this code on your car screen. So this problem may stop the car while driving and increase the risk of an accident. Sometimes ABS warning light on the dashboard is not coming on, so you need to check the vehicle inspected to see if the code is detected.


The trouble code U0415 is a generic communication problem code. It refers to the problem with the ABC control module. Most of the time, the wire or connector is accidentally damaged, and you face the scanner’s code. Try to fix the problem as soon as possible. This error increases the possibility of an accident because of the issue related to the brake system. If you want to fix the problem, I suggest you get help from TSBs. This contains all information about your car. The problem and the repairing method are also attached to this book. So TSBs are very helpful for any car owner, and most of the time, technicians also get help from them. It saves time as well as money.

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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