Code
U046B
Generic
U — Network/User
Invalid Data Received From Global Positioning System Module
Views:
UK: 26
EN: 41
RU: 27
AI status
Completed
Completed
100%
Causes
- Faulty or failing GPS/navigation module
- Corroded, loose, damaged, or disconnected wiring or connectors (power, ground, data bus, antenna)
- Failed or disconnected GPS antenna or antenna cable
- CAN/LIN/serial bus communication errors or high bus error rate
- Software/firmware mismatch or corrupted module software
- Intermittent power supply or ground problem (including blown fuse or weak battery)
Symptoms
- Navigation system shows incorrect or no position
- Telematics features (emergency call, stolen vehicle tracking) fail or unavailable
- Speed/heading or location-based driver assistance features behave incorrectly or disabled
- One or more network modules store U046B and possibly related communication U-codes
- Warning or message on instrument cluster or infotainment screen about GPS or navigation fault
What to check
- Retrieve all stored and pending DTCs and freeze frame data with a manufacturer-capable scan tool
- Check live data from the GPS module: latitude, longitude, satellite count, fix type, UTC time
- Inspect antenna connection, coax cable, and routing for damage, corrosion, or water intrusion
- Verify GPS module power and ground voltages (key on and cranking as required)
- Check for related communication codes (U0073, U0100, U0401, U0422) and overall bus health (CAN/LIN error counters)
- Visually inspect wiring harnesses, connectors, and pins for corrosion, bent pins, or poor mating
Signal parameters
- Latitude and longitude (decimal degrees)
- UTC time / date from GPS
- GPS fix status (no-fix, 2D, 3D)
- Number of satellites in view / used
- Horizontal dilution of precision (HDOP) or position accuracy estimate
- Speed over ground and heading
Diagnostic algorithm
- Connect a capable scan tool. Record U046B and any other stored codes and freeze frame data. Note module reporting source and any repeat patterns.
- Check live GPS data parameters. If values are blank, clearly invalid (e.g., impossible coordinates), or checksum/sequence errors are present, continue diagnostics.
- Inspect GPS antenna and cable: verify connector seating, look for corrosion or damage. If removable, reseat connector and recheck data.
- Verify module power and ground at the GPS module connector with key on. Compare to specification. Repair poor power/ground if found.
- Check communication bus health: monitor CAN/LIN for errors, bus-off events, or arbitration issues while observing the GPS module messages. Repair damaged bus wiring or terminators as needed.
- If wiring and power are good, check for software/firmware updates for the GPS/module and apply per manufacturer procedures. Reflash only with correct calibration files.
- If module is suspect after the above checks, substitute a known-good GPS module (if available) or install a replacement and verify the code does not return.
- After repairs, clear codes, perform a drive/test with clear sky view to allow satellite acquisition, and verify that live data is valid and the U046B does not reappear.
- If issue is intermittent, use long-term data logging and inspect for correlation with vehicle events (door open, accessory loads, nearby RF sources).
Likely causes
- GPS module producing corrupted or out-of-range NMEA/position data
- Antenna fault (open, short, or poor connection) preventing valid satellite fix
- Data bus wiring or connector fault between GPS module and network
- Module software/firmware error after update or corruption
- Intermittent power/ground to the GPS module
Fault status
Status
Module reports invalid or unexpected GPS data received on the vehicle network. Location/timing data may be corrupted, out-of-range, or not present.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Repair manuals
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Code
U046B
HYUNDAI
U — Network/User
Invalid Data Received From Global Positioning System Module
Views:
UK: 21
EN: 29
RU: 21
AI status
Completed
Completed
100%
Causes
- Faulty or failing GPS/navigation module
- Corroded, loose, damaged, or disconnected wiring or connectors (power, ground, data bus, antenna)
- Failed or disconnected GPS antenna or antenna cable
- CAN/LIN/serial bus communication errors or high bus error rate
- Software/firmware mismatch or corrupted module software
- Intermittent power supply or ground problem (including blown fuse or weak battery)
Symptoms
- Navigation system shows incorrect or no position
- Telematics features (emergency call, stolen vehicle tracking) fail or unavailable
- Speed/heading or location-based driver assistance features behave incorrectly or disabled
- One or more network modules store U046B and possibly related communication U-codes
- Warning or message on instrument cluster or infotainment screen about GPS or navigation fault
What to check
- Retrieve all stored and pending DTCs and freeze frame data with a manufacturer-capable scan tool
- Check live data from the GPS module: latitude, longitude, satellite count, fix type, UTC time
- Inspect antenna connection, coax cable, and routing for damage, corrosion, or water intrusion
- Verify GPS module power and ground voltages (key on and cranking as required)
- Check for related communication codes (U0073, U0100, U0401, U0422) and overall bus health (CAN/LIN error counters)
- Visually inspect wiring harnesses, connectors, and pins for corrosion, bent pins, or poor mating
Signal parameters
- Latitude and longitude (decimal degrees)
- UTC time / date from GPS
- GPS fix status (no-fix, 2D, 3D)
- Number of satellites in view / used
- Horizontal dilution of precision (HDOP) or position accuracy estimate
- Speed over ground and heading
Diagnostic algorithm
- Connect a capable scan tool. Record U046B and any other stored codes and freeze frame data. Note module reporting source and any repeat patterns.
- Check live GPS data parameters. If values are blank, clearly invalid (e.g., impossible coordinates), or checksum/sequence errors are present, continue diagnostics.
- Inspect GPS antenna and cable: verify connector seating, look for corrosion or damage. If removable, reseat connector and recheck data.
- Verify module power and ground at the GPS module connector with key on. Compare to specification. Repair poor power/ground if found.
- Check communication bus health: monitor CAN/LIN for errors, bus-off events, or arbitration issues while observing the GPS module messages. Repair damaged bus wiring or terminators as needed.
- If wiring and power are good, check for software/firmware updates for the GPS/module and apply per manufacturer procedures. Reflash only with correct calibration files.
- If module is suspect after the above checks, substitute a known-good GPS module (if available) or install a replacement and verify the code does not return.
- After repairs, clear codes, perform a drive/test with clear sky view to allow satellite acquisition, and verify that live data is valid and the U046B does not reappear.
- If issue is intermittent, use long-term data logging and inspect for correlation with vehicle events (door open, accessory loads, nearby RF sources).
Likely causes
- GPS module producing corrupted or out-of-range NMEA/position data
- Antenna fault (open, short, or poor connection) preventing valid satellite fix
- Data bus wiring or connector fault between GPS module and network
- Module software/firmware error after update or corruption
- Intermittent power/ground to the GPS module
Fault status
Status
Module reports invalid or unexpected GPS data received on the vehicle network. Location/timing data may be corrupted, out-of-range, or not present.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
Similar codes
Repair manuals
Manual library for HYUNDAI
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Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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