u0007 data transmission error
OBD2 Code: U0001
Description: High Speed CAN Communication Bus
Definition: This code indicates a problem with the high-speed Controller Area Network (CAN) communication bus, which is used for communication between various vehicle control modules.
OBD2 Code: U0002
Description: Low Speed CAN Communication Bus
Definition: This code signifies an issue with the low-speed CAN communication bus, affecting the transfer of information between different vehicle systems.
OBD2 Code: U0003
Description: Medium Speed CAN Communication Bus
Definition: This code refers to a fault in the medium-speed CAN communication bus, potentially disrupting module communications within the vehicle network.
OBD2 Code: U0100
Description: Lost Communication With ECM/PCM “A”
Definition: This code means that there is a loss of communication with the Engine Control Module (ECM) or Powertrain Control Module (PCM), which can affect engine performance and emissions.
OBD2 Code: U0121
Description: Lost Communication With Anti-lock Brake System (ABS) Control Module
Definition: This code indicates a failure in communication with the ABS control module, potentially impacting braking system functionality.
U0007 – High Severity: Data transmission error between modules in the vehicle.
Common Causes
– U0007 code – Data transmission error
– Common causes:
– Faulty wiring or connections in the CAN bus system
– Malfunctioning control module
– Software issues with the vehicle’s onboard computer
Common Misdiagnosis
OBD2 Code: U0007
Description: Data Transmission Error
Common Misdiagnosis: Replacing the communication module without checking for wiring issues or network problems.
Common Diagnostic Steps
OBD2 Code: U0007 – Data Transmission Error
Description: This code indicates a communication error between the vehicle’s control modules.
Common Diagnostic Steps:
- Check for any other diagnostic trouble codes (DTCs) that may be present. Address these codes first as they might be related to the U0007 code.
- Inspect all related wiring and connectors for signs of damage, corrosion, or disconnection. Pay special attention to the CAN bus wiring and connections.
- Verify that all control module ground connections are secure and free from corrosion.
- Use a scan tool to monitor data stream information from the affected modules to identify any irregularities in communication.
- If equipped, check for software updates or technical service bulletins (TSBs) related to communication issues for your specific vehicle make and model.
- If no faults are found with wiring or connectors, consider testing individual control modules using manufacturer-specific diagnostic procedures to determine if a module replacement is necessary.