OBD-II Standard OBD-II Universal Error Code U0751

OBD-II Standard OBD-II Major Heads Up

Model: OBD-II Universal | Code: U0751

Applicable Systems
OBD-II

Symptoms

The head-up display may not function. Communication with the HUD module is lost. DTC U0751 is stored by a control module that lost communication with the Heads Up module.

Possible Causes

  • CAN bus wiring to HUD fault
  • HUD power supply fault
  • HUD internal failure
  • HUD connector not seated

Troubleshooting Steps

  1. Step 1: Connect a diagnostic scanner and read all module DTCs to confirm U0751
    DTC U0751 is present; note which module logged the code
  2. Step 2: Check CAN bus wiring between the affected modules for continuity, shorts, and termination resistor values
    CAN high and low lines intact, 60 ohms across the bus
  3. Step 3: Verify power and ground supplies to the affected module
    Battery voltage at module power pin, less than 0.1V drop on ground side
  4. Step 4: If wiring is intact, the affected module may need replacement and programming
    Communication restored after module replacement and programming

How to Reset

Clear the DTC after repair using a diagnostic scanner. The code will clear automatically if communication is restored and no fault is detected for 3 consecutive drive cycles.

Common Replacement Parts

  • varies: Head-up display unit (if confirmed faulty) (Confirm part number via VIN before ordering; programming typically required)

Frequently Asked Questions

  • Q: What does code U0751 mean?

    This is a network communication DTC indicating lost communication with the Heads Up module. The CAN bus wiring, module power supply, and the module itself should be checked.

  • Q: Can I drive with code U0751?

    Driving may be possible but the affected system may not function. If the code relates to ECM, transmission, or brake communication, have it diagnosed promptly for safety.

Related OBD-II Standard Fault Codes

Source: SAE J2012 Standard OBD-II Diagnostic Trouble Codes

Category: OBD-II