U1173 – OBD-II DTC

OBD-II DTC U1173 – SCP (J1850) Invalid or Missing Data for Remote Button Control

DTC U1173 meaning

DTC U1173 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Remote Button Control” within the SCP (Serial Communication Protocol) using the J1850 communication standard. This code suggests that the vehicle’s control module is not receiving valid data from the remote button control system, which may affect various functionalities such as remote start, keyless entry, or other remote features.

DTC U1173 symptoms

Common symptoms associated with DTC U1173 may include:

• Inability to use remote keyless entry features
• Remote start function not working
• Dashboard warning lights illuminated
• Intermittent or complete loss of communication with the remote control system

DTC U1173 causes

Several factors can lead to the triggering of DTC U1173, including:

• Faulty remote control key fob
• Weak or dead battery in the remote key fob
• Damaged wiring or connectors in the remote control system
• Malfunctioning body control module (BCM)
• Software issues within the vehicle’s control modules

DTC U1173 seriousness

The seriousness of DTC U1173 can vary. While it may not pose an immediate safety risk, it can lead to inconvenience due to the loss of remote functionalities. If left unaddressed, it may indicate underlying issues with the vehicle’s electrical system that could lead to more significant problems over time.

How to diagnose DTC U1173

To diagnose DTC U1173, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1173.
2. Inspect the remote key fob for physical damage or battery issues.
3. Check the vehicle’s wiring and connectors related to the remote control system for any signs of damage or corrosion.
4. Test the body control module (BCM) for proper operation.
5. Review any related DTCs that may provide additional context for the issue.

How to fix DTC U1173 step-by-step instructions

To fix DTC U1173, follow these step-by-step instructions:

1. Replace the battery in the remote key fob if it is weak or dead.
2. If the remote key fob is damaged, replace it with a new one.
3. Repair or replace any damaged wiring or connectors found during the inspection.
4. If the BCM is malfunctioning, consider reprogramming or replacing it.
5. Clear the DTC using an OBD-II scanner and test the remote control functions to ensure they are working correctly.

How to erase DTC U1173

To erase DTC U1173, 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 trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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