I know you can’t think of a day without a vehicle. Many also own a car, and driving safety is the priority. An OBD2 scanner is a must-have part of every car. This onboard diagnostic scanner is mainly used to scan any problems in your vehicle in advance. This scanner uses many codes to show the problem, just like U3003 is a communication problem. When your vehicle faces a problem with ABS module battery voltage, the OBD2 scanner scans the problem and shows it on the car screen. 

Meaning of this code U3003:

The trouble code U3003 is a generic communication problem with battery voltage. The car has an ABS or Anti brake system control module, hydraulic pump, and solenoid valves that need some voltage to operate. And this voltage range is 10 and 17. And this voltage provider is BJB. The ABS module has a single ground located in the engine compartment wiring harness. There are one or more open circuits or excessive resistance. A discharged battery or any inoperative charging system results from the Anti brake system module setting a DTC. An ignition voltage supply circuit is used in the ABS module internally as a redundant voltage supply circuit if the voltage supply from the main battery interrupts.

When the battery voltage supply face problem, then the ABS immediately shuts down and doesn’t enter the power latch mode again. Then the module uses the power latch mode to write specific parameters to non-volatile memory. For that moment of each ignition cycle, a counter value is raised by one after a fixed vehicle speed has been reached, and also this specified time elapsed. The ABS module enters the power latch mode, and the counter again resets to null.

What is the reason behind the trouble code U3003?

There are some common causes behind this trouble code U3003. They are:anti lock braking system abstract

What is the symptom of this trouble code U3003?

When your car’s OBD2 scanner faces the problem of the ABS module with battery voltage, you can notice the illuminated engine light and the warning light of the Anti-brake system. These are the symptoms you can find after this problem.

How to diagnose the trouble code U3003?

The generic communication problem of this trouble code U3003 diagnosis process is not complex work. At first, visual inception needs to find any damage to the wiring or connectors of the ABS. Then check the harness of this control module. It’s open or short. A professional needs around one hour to diagnose and fix your car’s issue.

How to fix the OBD-II code U3003?

You need to follow some basic steps to solve the issue U3003. Like:

Final discussion: 

The trouble code U3003 is related to the Anti-brake Brake System module. That’s a serious issue, so you can’t quickly drive your car with this problem, and also, it’s not safe to drive with this issue. So repair case U3003 as soon as possible. If you cannot DIY it, you can go to the technician. It needs around one hour to fix this. But this time also depends on the model and type of the car. It would help if you had around 75$ to 100$ to solve the problem. But this cost is also variable for the car model and the technician’s area.

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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