U1159 – OBD-II DTC

OBD-II DTC U1159 – SCP (J1850) Invalid or Missing Data for Antenna

DTC U1159 meaning

DTC U1159 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 U1159 symptoms

Common symptoms associated with DTC U1159 may include:

• Inoperative or malfunctioning radio or audio system
• Loss of GPS functionality
• Warning lights illuminated on the dashboard
• Intermittent communication issues with other modules
• Erratic behavior of features dependent on antenna data

DTC U1159 causes

Several factors can lead to the triggering of DTC U1159, 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• Software glitches or outdated firmware in the control modules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 U1159 seriousness

The seriousness of DTC U1159 can vary based 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 or navigation systems. Ignoring this code may result in further communication issues within the vehicle’s network, potentially affecting other critical systems.

How to diagnose DTC U1159

To diagnose DTC U1159, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the U1159 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, open circuits, or frayed wires.
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 all related connectors and wiring.

How to fix DTC U1159 step-by-step instructions

To fix DTC U1159, follow these step-by-step instructions:

1. Address any physical damage found during the inspection of the antenna and connections.
2. Repair or replace any damaged wiring or connectors.
3. If the antenna is faulty, replace it with a new one.
4. Update the control module software if necessary.
5. Clear the DTC using an OBD-II scanner.
6. Test drive the vehicle to ensure the code does not reappear.
7. Re-scan the vehicle to confirm that the DTC has been resolved.

How to erase DTC U1159

To erase DTC U1159, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase DTCs.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and turn off the ignition.
6. Start the vehicle and monitor for any reoccurrence of the DTC.

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.