U1107 – OBD-II DTC

OBD-II DTC U1107 – SCP (J1850) Invalid or Missing Data for Legislated Diagnostics

DTC U1107 meaning

DTC U1107 refers to a communication issue within the vehicle’s onboard diagnostic system, specifically related to the SCP (Serial Communication Protocol) using the J1850 standard. This code indicates that there is invalid or missing data for legislated diagnostics, which means that the vehicle’s control modules are unable to communicate properly or are not receiving the necessary data to perform diagnostics as required by regulations.

DTC U1107 symptoms

Common symptoms associated with DTC U1107 may include:

• Illumination of the check engine light
• Loss of communication with certain modules
• Erratic behavior of vehicle systems (e.g., ABS, traction control)
• Inability to perform certain diagnostic tests
• Potential performance issues or reduced functionality of vehicle features

DTC U1107 causes

Several factors can lead to the triggering of DTC U1107, including:

• Faulty wiring or connectors in the communication network
• Defective control modules
• Corrosion or damage to the connectors
• Software issues or bugs in the vehicle’s control systems
• Interference from aftermarket devices or modifications

DTC U1107 seriousness

The seriousness of DTC U1107 can vary depending on the specific vehicle and the systems affected. However, it is generally considered a moderate to serious issue because:

• It can lead to the malfunction of critical vehicle systems.
• It may prevent the vehicle from passing emissions tests.
• It can result in further diagnostic complications if not addressed.

How to diagnose DTC U1107

To diagnose DTC U1107, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1107.
2. Check for any additional DTCs that may provide more context.
3. Inspect the wiring and connectors related to the SCP communication network for damage or corrosion.
4. Test the affected control modules for proper operation.
5. Verify the integrity of the vehicle’s battery and ground connections.
6. Check for software updates or reprogramming needs for the control modules.

How to fix DTC U1107 step-by-step instructions

To fix DTC U1107, follow these steps:

1. Repair or replace any damaged wiring or connectors found during diagnosis.
2. Replace any faulty control modules identified in the diagnostic process.
3. Clean any corroded connectors and ensure a secure connection.
4. Update or reprogram the control modules if necessary.
5. Clear the DTCs using an OBD-II scanner and perform a test drive to verify the fix.
6. Monitor the vehicle for any reoccurrence of the DTC.

How to erase DTC U1107

To erase DTC U1107, 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 DTC menu on the scanner and select the option to clear or erase codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the DTC does not reappear.

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