U2003 – OBD-II DTC

OBD-II DTC U2003 – Audio Compact Disk / Disk Jockey Unit is Not Responding

DTC U2003 meaning

DTC U2003 indicates that the Audio Compact Disk / Disk Jockey Unit is not responding to commands from the vehicle’s onboard diagnostic system. This code is part of the U-series, which typically relates to network communication issues between modules in the vehicle.

DTC U2003 symptoms

Common symptoms associated with DTC U2003 may include:

• No audio output from the CD player or audio system.
• Inability to control the audio system through the vehicle’s interface.
• Display errors on the audio system screen.
• Intermittent or complete loss of functionality of the CD player.

DTC U2003 causes

Several factors can lead to the triggering of DTC U2003, including:

• Faulty audio compact disk unit or disk jockey unit.
• Wiring issues, such as damaged or corroded connectors.
• Communication problems within the vehicle’s network.
• Software glitches or outdated firmware in the audio unit.
• Power supply issues affecting the audio unit.

DTC U2003 seriousness

DTC U2003 is considered a moderate issue. While it does not typically affect the vehicle’s drivability, it can lead to a lack of entertainment options, which may be a concern for some drivers. Additionally, unresolved communication issues could indicate broader problems within the vehicle’s electronic systems.

How to diagnose DTC U2003

To diagnose DTC U2003, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC U2003.
2. Check for any additional DTCs that may provide more context.
3. Inspect the wiring and connectors related to the audio unit for damage or corrosion.
4. Verify the power supply to the audio unit.
5. Test the audio unit for functionality using a multimeter or by connecting it to a known working system.
6. Check for software updates or resets that may resolve communication issues.

How to fix DTC U2003 step-by-step instructions

To fix DTC U2003, follow these steps:

1. Inspect and repair any damaged wiring or connectors related to the audio unit.
2. Ensure that the audio unit is receiving proper power and ground connections.
3. If the audio unit is faulty, replace it with a new or refurbished unit.
4. Update the software or firmware of the audio unit if applicable.
5. Clear the DTC using an OBD-II scanner and test the system to ensure the issue is resolved.

How to erase DTC U2003

To erase DTC U2003, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the DTCs.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to check if the code reappears.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.