U1172 – OBD-II DTC

OBD-II DTC U1172 – SCP (J1850) Invalid or Missing Data for Remote Button Control

DTC U1172 meaning

DTC U1172 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Remote Button Control.” 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 communication standard. It typically signifies that the vehicle’s control module is not receiving valid data from the remote button control system, which may affect functions like keyless entry or remote start.

DTC U1172 symptoms

Common symptoms associated with DTC U1172 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 U1172 causes

Several factors can lead to the triggering of DTC U1172, including:

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

DTC U1172 seriousness

DTC U1172 is generally considered a moderate issue. While it may not affect the vehicle’s drivability, it can hinder the functionality of important convenience features such as remote locking and unlocking, which can impact security and ease of use. Addressing this code promptly is advisable to restore full functionality.

How to diagnose DTC U1172

To diagnose DTC U1172, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1172.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the remote key fob for physical damage or battery issues.
4. Examine wiring and connectors related to the remote control system for signs of wear or damage.
5. Test the body control module (BCM) for proper operation.
6. Verify that the vehicle’s software is up to date.

How to fix DTC U1172 step-by-step instructions

To fix DTC U1172, follow these steps:

1. Replace the battery in the remote key fob if it is weak or dead.
2. Repair or replace any damaged wiring or connectors found during inspection.
3. If the remote key fob is faulty, replace it with a new one.
4. Reprogram the remote key fob to the vehicle if necessary.
5. Update the vehicle’s software if any updates are available.
6. Clear the DTC using an OBD-II scanner and test the remote control functions.

How to erase DTC U1172

To erase DTC U1172, 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 “Erase Codes” or “Clear DTCs” function on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to verify if the code reappears.

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