U1227 – OBD-II DTC

OBD-II DTC U1227 – SCP (J1850) Invalid or Missing Data for Body Status Request

DTC U1227 meaning

DTC U1227 refers to a diagnostic trouble code that indicates an issue with the communication between the body control module (BCM) and other modules in the vehicle. Specifically, it signifies that there is invalid or missing data for a body status request over the SCP (J1850) communication protocol. This can affect various body functions such as lighting, door locks, and other electronic features controlled by the BCM.

DTC U1227 symptoms

Common symptoms associated with DTC U1227 may include:

• Inoperative or malfunctioning body control features (e.g., power windows, door locks)
• Warning lights illuminated on the dashboard
• Erratic behavior of electronic components
• Failure of the vehicle to respond to remote key fob commands

DTC U1227 causes

Several factors can lead to the occurrence of DTC U1227, including:

• Faulty body control module (BCM)
• Wiring issues, such as damaged or corroded connectors
• Communication network problems, including short circuits or open circuits
• Software glitches or outdated firmware in the BCM
• Other related module failures that disrupt communication

DTC U1227 seriousness

The seriousness of DTC U1227 can vary depending on the specific symptoms and the impact on vehicle functionality. While it may not pose an immediate safety risk, it can lead to inconvenience and potential failure of critical body functions. It is advisable to address this code promptly to ensure all electronic systems operate correctly.

How to diagnose DTC U1227

To diagnose DTC U1227, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC U1227.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors related to the BCM for damage or corrosion.
4. Test the BCM for proper operation using manufacturer-specific diagnostic tools.
5. Verify the communication between the BCM and other modules on the SCP network.

How to fix DTC U1227 step-by-step instructions

To fix DTC U1227, follow these steps:

1. Repair or replace any damaged wiring or connectors found during the inspection.
2. If the BCM is faulty, replace it with a new or refurbished unit.
3. Update the BCM software if necessary, following manufacturer guidelines.
4. Clear any additional trouble codes that may have been stored.
5. Test the vehicle’s body control features to ensure proper operation.

How to erase DTC U1227

To erase DTC U1227, perform the following steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu and select the option to clear or erase codes.
3. Confirm the action and wait for the scanner to complete the process.
4. Disconnect the scanner and take the vehicle for a test drive to ensure the code does not return.

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