U3003 Code - ABS Module Battery Voltage
Quick Answer
The Anti-Lock Brake System (ABS) Module, hydraulic pump and solenoid valves require an operating voltage that is between 10 and 17 volts. Common causes include Faulty Anti-Lock Brake System (ABS) Module, Anti-Lock Brake System (ABS) Module harness is open or shorted, Anti-Lock Brake System (ABS) Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- U3003 indicates ABS Module Battery Voltage.
- Common causes
- Common causes include Faulty Anti-Lock Brake System (ABS) Module, Anti-Lock Brake System (ABS) Module harness is open or shorted, Anti-Lock Brake System (ABS) Module circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code U3003 Description
Internally to the ABS module, the ignition voltage supply circuit is used as a redundant back up for the battery voltage supply circuit in case the battery voltage supply circuit is interrupted. If the battery voltage supply circuit is interrupted, the ABS module immediately shuts off and does not enter the power latch mode. The module uses the power latch mode to write certain parameters (such as learned offsets numbers) to non-volatile memory. At the beginning of each ignition cycle, a counter value is increased by 1 after a specified vehicle speed has been reached and a specified time has elapsed. When the ABS module enters the power latch mode, this counter is reset to 0.
What are the Possible Causes of the DTC U3003?
- Faulty Anti-Lock Brake System (ABS) Module
- Anti-Lock Brake System (ABS) Module harness is open or shorted
- Anti-Lock Brake System (ABS) Module circuit poor electrical connection
How to Fix the DTC U3003?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the U3003 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the U3003 code?
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Information for Specific Makes
- U3003 Buick — Battery Voltage
- U3003 Cadillac — Battery Voltage
- U3003 Chevrolet — Battery Voltage
- U3003 Ford — ABS Module Battery Voltage
- U3003 GMC — Battery Voltage
- U3003 Lincoln — ABS Module Battery Voltage
- U3003 Mercury — ABS Module Battery Voltage
Frequently Asked Questions about U3003 Code
1. What does the OBDII code U3003 for ABS Module Battery Voltage mean?
The U3003 code indicates that there is a low voltage condition detected in the ABS module's battery power circuit.
2. What are the common symptoms of a U3003 ABS Module Battery Voltage code?
Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the braking system.
3. What can cause the U3003 ABS Module Battery Voltage code to trigger?
Possible causes include a weak or failing vehicle battery, corroded battery terminals, poor electrical connections, a faulty ABS module, or issues with the wiring harness.
4. How can I diagnose the U3003 ABS Module Battery Voltage code?
Diagnosis typically involves checking the vehicle battery voltage, inspecting the battery terminals for corrosion, testing the ABS module and related components, and verifying the integrity of the wiring harness.
5. Can I still drive my vehicle with a U3003 ABS Module Battery Voltage code?
It is not recommended to drive your vehicle with a U3003 code as it can affect the proper functioning of the ABS system, compromising safety. It is advised to address the issue promptly.
6. How can I repair a U3003 ABS Module Battery Voltage code?
Repair options may include replacing the vehicle battery if it is weak or faulty, cleaning or replacing corroded battery terminals, repairing damaged wiring, or replacing the ABS module if necessary.
7. Is it possible to reset the U3003 ABS Module Battery Voltage code without repairs?
Resetting the code without addressing the underlying issue may temporarily turn off the warning light, but the problem will likely reoccur. It is best to diagnose and repair the issue to prevent further complications.
8. Can a U3003 ABS Module Battery Voltage code be a DIY fix?
Depending on your level of automotive expertise, some aspects of diagnosing and repairing the U3003 code may be DIY-friendly, such as checking the battery terminals or connections. However, more complex repairs may require professional assistance.
9. Will a U3003 ABS Module Battery Voltage code affect my vehicle's performance?
While the code itself may not drastically impact performance, the underlying issue causing the code can affect the ABS system's functionality, potentially compromising braking performance and safety.
10. How much does it cost to repair a U3003 ABS Module Battery Voltage code?
The cost of repairs can vary depending on the specific cause of the U3003 code, the need for parts replacement, and labor costs. It is advisable to consult a mechanic for a proper diagnosis and cost estimate.
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