U1247 – OBD-II DTC

OBD-II DTC U1247 – SCP (J1850) Invalid or Missing Data for Primary Id

DTC U1247 meaning

DTC U1247 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Primary Id” in vehicles using the SCP (J1850) communication protocol. This code suggests that the vehicle’s onboard diagnostic system has detected an issue with the data being transmitted from one of the modules, specifically related to the primary identifier of the communication network.

DTC U1247 symptoms

Common symptoms associated with DTC U1247 may include:

• Illumination of the check engine light
• Loss of communication with certain vehicle modules
• Erratic or non-functional vehicle features
• Diagnostic tools unable to retrieve data from the vehicle

DTC U1247 causes

Several factors can lead to the occurrence of DTC U1247, including:

• Faulty wiring or connectors in the SCP network
• Defective vehicle control modules
• Corrupted software in one or more modules
• Issues with the vehicle’s battery or power supply

DTC U1247 seriousness

The seriousness of DTC U1247 can vary. While it may not immediately affect vehicle drivability, it can lead to communication issues between modules, potentially resulting in malfunctioning systems. It is advisable to address this code promptly to prevent further complications.

How to diagnose DTC U1247

To diagnose DTC U1247, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the SCP network for damage or corrosion.
4. Test the affected modules for proper operation and communication.
5. Verify the vehicle’s battery voltage and ground connections.

How to fix DTC U1247 step-by-step instructions

To fix DTC U1247, follow these steps:

1. Repair or replace any damaged wiring or connectors found during the inspection.
2. If a specific module is identified as faulty, replace or reprogram it as necessary.
3. Ensure all modules are updated with the latest software versions.
4. Check and replace the vehicle’s battery if it is weak or failing.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle to see if the code returns.

How to erase DTC U1247

To erase DTC U1247, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. 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 perform a test drive to ensure the code does not reappear.

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