U0192 is a generic OBD-II network communication fault code that means Lost Communication With Personal Computer. The vehicle has detected that communication with the Personal Computer module has been lost.
The Personal Computer module refers to an electronic computer-related module used by applicable vehicle systems. Depending on the manufacturer, it may be associated with an infotainment, multimedia, rear entertainment, communication, or specialized vehicle computer system.
U0192 does not automatically mean that the Personal Computer module has failed. A blown fuse, loss of power, poor ground, damaged communication wiring, connector corrosion, low system voltage, or a vehicle network fault can also cause this code.
Fault Code Description
U0192 = Lost Communication With Personal Computer.
Code type: Generic OBD-II Network Communication Code.
Likely fault location: Personal Computer module, module power supply, ground circuit, fuse, communication wiring, connectors, gateway, or vehicle communication network.
The term Personal Computer is part of the standardized diagnostic description. The actual module name and function can vary between manufacturers and vehicle platforms.
What Does U0192 Mean?
Modern vehicles contain multiple electronic modules that communicate through one or more vehicle networks. When another module expects communication from the Personal Computer module but the expected messages are no longer received, U0192 may be stored.
The communication failure can be caused by loss of module power, poor ground, an open or shorted communication circuit, damaged connectors, network problems, low battery voltage, or an internal module failure.
Symptoms of U0192
- Personal Computer-related functions may stop operating.
- Infotainment or multimedia functions may be unavailable on applicable vehicles.
- Display or entertainment functions may malfunction.
- Communication error may appear on the infotainment system.
- Some vehicle computer functions may become unavailable.
- Diagnostic scan tool may be unable to communicate with the module.
- Intermittent electronic system operation.
- Multiple communication U-codes may be stored.
- System may restart or freeze intermittently.
Common Causes of U0192
- Blown fuse supplying the Personal Computer module.
- Loss of battery power.
- Loss of ignition or accessory power.
- Poor module ground.
- Open communication circuit.
- Short circuit in communication wiring.
- High resistance in the network wiring.
- Damaged wiring harness.
- Corroded electrical connector.
- Loose or damaged connector terminals.
- Water or moisture intrusion.
- Low or unstable battery voltage.
- Gateway or network communication fault.
- Software or configuration problem.
- Internal failure of the Personal Computer module.
Personal Computer Module vs. Computer Hardware
The Personal Computer module in the diagnostic definition should not automatically be interpreted as a conventional consumer laptop or desktop computer.
It refers to an electronic module recognized by the vehicle's diagnostic and communication architecture. The actual function and physical design depend on the manufacturer.
Personal Computer Module
An electronic vehicle module identified by the diagnostic system as the Personal Computer. Its actual function varies by application.
Vehicle Communication Network
Allows the Personal Computer module to exchange information with other electronic modules through the applicable vehicle network.
U0192 Personal Computer Module Fuse
The Personal Computer module requires one or more protected power supplies. Depending on the vehicle, the applicable fuse may be located in the interior fuse box, instrument-panel fuse box, or engine-compartment fuse box.
The fuse may be labeled PC, COMPUTER, INFO, MEDIA, INFOTAINMENT, RADIO, or another manufacturer-specific designation.
There is no universal fuse number for U0192. Always use the fuse diagram for the exact vehicle.
How to Check the Fuse
- Locate the vehicle-specific fuse diagram.
- Identify the fuse supplying the applicable module.
- Verify the correct fuse rating.
- Inspect the fuse for an open element.
- Test for voltage at the fuse when the circuit is energized.
- Inspect fuse terminals for corrosion or overheating.
- Never install a higher-rated fuse.
If a replacement fuse blows immediately, do not repeatedly replace it. Diagnose the circuit for a short circuit, damaged wiring, water intrusion, or excessive current draw.
U0192 Module Power and Ground
A module can appear completely defective when it has simply lost its power or ground supply.
Use the vehicle-specific wiring diagram to identify all battery, ignition, accessory, wake-up, and ground circuits connected to the Personal Computer module.
Verify the required voltage and ground quality according to the manufacturer's specifications.
U0192 Wiring and Communication Circuit
Inspect the wiring between the Personal Computer module and the vehicle communication network.
- Check for open circuits.
- Check for short circuits to power.
- Check for short circuits to ground.
- Inspect damaged insulation.
- Check for high resistance.
- Inspect connector terminals.
- Look for corrosion or water contamination.
- Check wiring affected by vibration or previous repairs.
The exact communication network and electrical test values vary between vehicles. Use the manufacturer's wiring diagram and diagnostic procedure rather than applying one universal specification.
How to Diagnose U0192
1. Perform a Complete Vehicle Scan
Scan all available control modules with a professional scan tool. Record U0192 and any additional communication, voltage, infotainment, computer, or network-related codes.
If multiple modules report communication faults, investigate common power supplies, grounds, gateways, or network problems before replacing the Personal Computer module.
2. Attempt Communication With the Module
Use the scan tool to determine whether the Personal Computer module can be accessed.
If the scan tool cannot communicate with the module, continue with power, ground, fuse, connector, and network testing.
3. Check the Fuse Box
Inspect all fuses associated with the applicable computer, infotainment, multimedia, communication, or control system. Confirm the correct fuse rating and verify that power is actually reaching the circuit.
4. Test Module Power and Ground
Verify all module power feeds and ground circuits using the vehicle-specific wiring diagram. Repair any missing power supply or poor ground before continuing.
5. Inspect the Module Connector
Inspect the connector for corrosion, bent pins, loose terminals, damaged locking tabs, contamination, or water intrusion.
6. Test the Communication Network
If power and ground are correct, test the applicable communication circuits according to the manufacturer's diagnostic procedure.
7. Check Related Modules
Check the gateway, infotainment, display, radio, multimedia, and other related modules for additional communication codes. Multiple U-codes can indicate a common network or power problem.
8. Consider Module Failure Last
Only after the fuse, power supply, ground, connectors, wiring, and communication network have been verified should the Personal Computer module itself be considered defective.
U0192 Diagnostic Signal Flow
↓
Fuse Box
↓
Power & Ground
↓
Personal Computer Module
↓
Vehicle Communication Network
↓
Gateway / Infotainment / Related Modules
U0192 Slow Signal Flow
A simplified diagnostic signal sequence can be represented as follows:
↓
Personal Computer Module Wakes Up
↓
Module Performs Internal Processing
↓
Network Communication Begins
↓
Gateway Receives Module Messages
↓
Related Modules Exchange Data
↓
System Function Becomes Available
If the sequence stops before module wake-up, investigate power and ground. If the module powers up but network communication is absent, investigate the communication circuit and network. If communication is present but the system function remains unavailable, investigate the related application, software, or connected components.
U0192 Multimeter Testing
A digital multimeter (DMM) is useful for checking the basic electrical conditions that can cause U0192. The exact test points and voltage specifications must come from the vehicle-specific wiring diagram.
Battery and Power Supply Test
- Set the multimeter to DC voltage.
- Connect the black lead to a known-good ground.
- Measure the module's battery power supply.
- Measure ignition or accessory power when applicable.
- Compare the measured voltage with the manufacturer's specification.
A missing power feed indicates that the diagnosis should move upstream toward the fuse, fuse box, wiring, relay, ignition circuit, or power-distribution system.
Ground Voltage-Drop Test
A voltage-drop test can identify a poor module ground that may not be obvious with a simple resistance test.
- Set the multimeter to DC voltage.
- Place the positive probe on the module ground circuit.
- Place the negative probe on a known-good battery negative or chassis ground.
- Operate the system under load.
- Observe the voltage difference.
The acceptable voltage-drop limit is vehicle-specific. A higher-than-specified reading indicates excessive resistance in the ground path.
Communication Circuit Testing
On CAN-equipped vehicles, a multimeter can provide useful preliminary checks of the communication network, but it cannot replace an oscilloscope for detailed waveform diagnosis.
Check the applicable CAN-H and CAN-L circuits according to the manufacturer's procedure. Do not probe network terminals in a way that could short adjacent circuits.
Resistance Test Warning
Before measuring resistance on a communication circuit, follow the manufacturer's shutdown procedure and ensure the network is powered down when required. Measuring resistance on an energized circuit can produce misleading results or damage components.
U0192 OBD Live Data
A professional scan tool may provide module communication status, system voltage, network status, module availability, and other vehicle-specific parameters.
Compare the Personal Computer module status with other network modules. If the module is completely unavailable while other modules communicate normally, focus on the module's power, ground, connector, and communication circuits.
U0192 Oscilloscope Testing
An oscilloscope can be used for advanced diagnosis of CAN communication faults. Observe CAN-H and CAN-L activity and compare the waveform with the manufacturer's specifications.
Normal CAN Communication
CAN-L ‾‾\__/‾‾\__/‾‾\__/‾‾\__/‾‾
Possible Communication Fault
CAN-L ─────────────────────────
Possible causes:
- Open circuit
- Short circuit
- Bus-off condition
- Loss of module power
- Network fault
Is U0192 Serious?
U0192 is generally low to moderate severity when it is isolated to a computer, multimedia, or entertainment-related module. However, the actual severity depends on the vehicle and the functions controlled by the affected module.
If U0192 appears with multiple communication codes, the underlying network or power problem should be diagnosed promptly because other vehicle systems may also be affected.
Can I Drive With U0192?
If U0192 is isolated and the vehicle operates normally, driving may be possible. However, any additional warning lights, loss of safety-related functions, or multiple communication codes should be investigated before continued operation.
U0192 Repair Cost
- Electrical diagnosis: approximately $50–$150+.
- Fuse or power repair: approximately $20–$150+.
- Wiring or connector repair: approximately $50–$300+.
- Used module: approximately $50–$300+.
- New or remanufactured module: approximately $150–$800+.
- Programming or configuration: additional cost may apply.
These are general estimates only. Actual repair costs depend on the vehicle, module design, parts availability, labor rate, and programming requirements.
Personal Computer Module Replacement
If the Personal Computer module is confirmed to be defective, replacement access depends on the vehicle. The module may be located behind the dashboard, inside the center console, near the infotainment system, or in another vehicle-specific location.
Some vehicles require programming, configuration, initialization, calibration, or security procedures after module replacement.
The replacement module should be matched to the exact vehicle, model year, system configuration, and equipment level.
Common Diagnostic Mistakes
- Replacing the Personal Computer module before checking the fuse.
- Failing to verify module power and ground.
- Ignoring low battery voltage.
- Ignoring connector corrosion.
- Ignoring communication wiring.
- Failing to scan all control modules.
- Replacing the module before checking related U-codes.
- Measuring network resistance while the network is energized.
- Using a generic pinout instead of the correct factory wiring diagram.
- Replacing a module without checking programming requirements.
Related Fault Codes
- U0191 – Lost Communication With Television.
- U0184 – Lost Communication With Radio.
- U0186 – Lost Communication With Audio Amplifier A.
- U0190 – Lost Communication With Digital Disc Player/Changer Module D.
FAQ About U0192
What does U0192 mean?
U0192 means Lost Communication With Personal Computer. The vehicle has detected that communication with the module identified as the Personal Computer has been lost.
Is U0192 a generic OBD-II code?
Yes. U0192 is a generic network communication code in the U-code family. The standardized definition is Lost Communication With Personal Computer.
Does U0192 mean the computer module is bad?
No. The module should not be condemned until its fuse, power supply, ground, connectors, wiring, and communication network have been tested.
Can a blown fuse cause U0192?
Yes. If the module loses its required power supply because of a blown fuse or an open power circuit, other modules may detect that communication has been lost.
Can wiring cause U0192?
Yes. An open circuit, short circuit, high resistance, damaged communication wiring, or poor connector contact can interrupt communication with the Personal Computer module.
Can a multimeter diagnose U0192?
A multimeter can diagnose important parts of the fault, including module power, ground voltage drop, fuse voltage, and some basic communication-circuit conditions. Advanced network diagnosis may require an oscilloscope and manufacturer-specific diagnostic procedures.
Can U0192 return after repair?
Yes. U0192 can return if the original communication problem has not been completely repaired. Intermittent power loss, poor ground, loose connector terminals, damaged network wiring, low system voltage, or an internal module fault can cause the code to return.
If U0192 returns after clearing the code, perform another complete vehicle scan and determine whether the Personal Computer module is permanently offline or losing communication intermittently. The root cause should be repaired rather than simply clearing the code.
Final Takeaway
U0192 means Lost Communication With Personal Computer. The code identifies a communication failure and does not automatically prove that the Personal Computer module itself has failed.
The correct diagnostic approach is to check the fuse box, power supply, ground, connectors, communication wiring, gateway, related modules, and vehicle network before replacing the module.
A multimeter is especially useful for verifying power supply, ground quality, voltage drop, fuse voltage, and basic electrical conditions. For detailed CAN waveform analysis, an oscilloscope may provide additional information.
Diagnose the electrical and communication path first, then condemn the module only when the external circuits have been proven good.