U1158 – OBD-II DTC

OBD-II DTC U1158 – SCP (J1850) Invalid or Missing Data for Antenna

DTC U1158 meaning

DTC U1158 refers to a communication issue within the vehicle’s network, specifically indicating “Invalid or Missing Data for Antenna.” This code is part of the On-Board Diagnostics II (OBD-II) system and is associated with the SCP (Serial Communication Protocol) using the J1850 standard. The code suggests that the vehicle’s control modules are unable to receive valid data from the antenna, which may affect various functions such as radio operation, GPS, or other communication-dependent features.

DTC U1158 symptoms

Common symptoms associated with DTC U1158 may include:

• Loss of radio signal or poor audio quality
• Inoperative GPS or navigation system
• Warning lights on the dashboard
• Intermittent communication issues with other modules
• Erratic behavior of electronic features

DTC U1158 causes

Several factors can lead to the triggering of DTC U1158, including:

• Faulty antenna or antenna connections
• Wiring issues, such as shorts or open circuits
• Defective control module that processes antenna data
• Corrosion or damage at connectors
• Software glitches or outdated firmware in the control modules

DTC U1158 seriousness

The seriousness of DTC U1158 can vary depending on the vehicle’s reliance on the affected systems. While it may not pose an immediate safety risk, it can lead to significant inconvenience due to the malfunctioning of audio, navigation, or communication systems. Ignoring this code may result in further complications or damage to the vehicle’s electronic systems.

How to diagnose DTC U1158

To diagnose DTC U1158, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the U1158 code.
2. Check for any additional DTCs that may provide more context.
3. Inspect the antenna and its connections for physical damage or corrosion.
4. Examine the wiring harness for shorts, breaks, or loose connections.
5. Test the antenna with a multimeter to ensure it is functioning correctly.
6. Check the control module for software updates or faults.
7. Perform a visual inspection of the vehicle’s communication network.

How to fix DTC U1158 step-by-step instructions

To fix DTC U1158, follow these step-by-step instructions:

1. Address any physical damage found on the antenna or its connections.
2. Repair or replace any damaged wiring or connectors.
3. Replace the antenna if it is determined to be faulty.
4. Update the control module software if necessary.
5. Clear any corrosion from connectors and ensure a secure fit.
6. Reconnect all components and ensure proper installation.
7. Use the OBD-II scanner to clear the DTC and test drive the vehicle.
8. Recheck for the DTC to ensure it does not return.

How to erase DTC U1158

To erase DTC U1158, 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 “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the DTC from the vehicle’s memory.
5. Disconnect the scanner and start the vehicle to verify that the code does not return.

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.