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Lowrance GPS devices are designed to help users with navigation, positioning, mapping, and other marine activities. Like any electronic navigation device, a Lowrance GPS can sometimes experience errors that affect location accuracy, signal reception, maps, or normal operation.

A GPS error does not always mean that the device has a serious problem. Weak satellite reception, incorrect settings, outdated software, poor connections, or temporary system issues can all affect GPS performance. This easy troubleshooting guidance explains how to fix common Lowrance GPS errors and restore normal operation.

Check the GPS Signal

The first thing to check is the GPS signal. Your Lowrance device needs a clear view of the sky to receive satellite signals properly.

If the device is being used in an area surrounded by tall structures, heavy cover, or other obstructions, satellite reception may be reduced. Move the device or vessel to a more open location and allow the GPS some time to establish a signal.

Avoid placing the GPS antenna where objects can block its view of the sky.

Restart Your Lowrance GPS

A simple restart can resolve temporary software or communication problems.

Turn off your Lowrance GPS and wait briefly before turning it back on. Allow the device to complete its startup process and check whether the GPS signal returns.

Restarting the device can refresh its internal processes and may resolve temporary errors without changing your saved settings.

Check the GPS Settings

Incorrect GPS settings can affect positioning information.

Open the device settings and review the available GPS or navigation options. Make sure the appropriate positioning features are enabled.

If you recently changed settings, review those changes carefully. Returning an incorrectly configured option to its normal setting may help restore GPS functionality.

Give the Device Time to Acquire Satellites

A GPS device may need some time to establish a satellite connection, particularly after being restarted, moved to a new location, or left unused for an extended period.

Keep the device powered on in an open area and allow it enough time to acquire satellite information.

Avoid repeatedly turning the device off and on while it is attempting to establish a GPS position.

Check the Antenna

If your Lowrance setup uses an external GPS antenna, inspect the antenna and its connection.

Make sure the antenna is positioned appropriately and that its cable is securely connected. A loose connection can prevent the device from receiving reliable GPS information.

Check the cable for visible damage, cuts, or signs of wear. If the antenna or cable appears damaged, professional assistance may be required.

Check Power Connections

An unstable power supply can cause electronic devices to restart, freeze, or behave unexpectedly.

Check the power connection to your Lowrance GPS and make sure the connections are secure. Inspect the power cable and related connections for visible damage or looseness.

If the device repeatedly turns off or restarts, the problem may be related to power rather than the GPS signal itself.

Check for Software Updates

Software updates can improve device performance and may resolve known issues.

Check whether your Lowrance model has a newer software version available. Follow the appropriate update instructions for your specific device.

Before installing an update, make sure the device has sufficient power and follow the manufacturer's instructions carefully.

Avoid interrupting an update while it is in progress.

Check Your Maps

If the GPS position appears correct but map information is missing or inaccurate, the problem may be related to the mapping data rather than GPS reception.

Check that the correct map or chart is available and properly recognized by the device. If you use an external memory card for maps, make sure it is inserted correctly and can be recognized by the unit.

If map information appears corrupted or incomplete, follow the appropriate Lowrance guidance for restoring or updating the chart data.

Check the Memory Card

A damaged or improperly inserted memory card can sometimes cause problems with maps, software updates, or other device functions.

Turn the device off before removing or reinserting a memory card. Check the card for visible damage and make sure it is seated correctly.

If the device works normally after removing a problematic card, the card or its contents may require further attention.

Check Your Location Settings

If the displayed location seems incorrect, review the GPS and coordinate-related settings on your device.

Make sure the appropriate coordinate format and positioning settings are selected for your needs. Incorrect configuration can make a correct GPS position appear different from what you expect.

Compare the displayed information with another reliable navigation source when appropriate.

Check for Interference

Electronic interference can sometimes affect GPS performance.

Check whether nearby electronic equipment, wiring, or other devices could be interfering with the GPS antenna or related connections.

Keep the GPS antenna positioned away from potential sources of interference whenever practical.

Allow the Device to Stabilize

If the GPS location is changing frequently or appears inaccurate, allow the device some time to stabilize.

Keep the device in a suitable open location and monitor the GPS information for a while. Moving rapidly between locations or operating in an area with limited satellite visibility can affect the displayed position.

If the position remains consistently inaccurate, continue with the other troubleshooting steps.

Restore Settings Carefully

If the problem started after changing several settings, reviewing or restoring appropriate settings may help.

Before performing any reset, check whether your device offers options that preserve saved information. A full reset can remove customized settings and other stored information.

Only use a reset when simpler troubleshooting methods have not resolved the problem and you understand what information may be affected.

Check the Device Connections

If your Lowrance GPS is connected to other marine electronics, inspect the relevant connections.

A loose communication connection can prevent accurate information from being shared between devices. Check the cables and connectors for secure connections and visible damage.

If the GPS works independently but not when connected to another device, the communication setup may need further troubleshooting.

Look for Environmental Causes

GPS performance can vary depending on the surrounding environment.

Buildings, trees, terrain, weather conditions, and other obstructions may reduce satellite visibility. When possible, test the GPS in a more open location.

If the device works correctly in an open area but develops errors in a specific location, environmental conditions may be contributing to the problem.

Contact Lowrance Support

If your Lowrance GPS continues to display errors after basic troubleshooting, the device may require additional technical assistance.

Before contacting support, note the exact error message, your Lowrance model, what happens when the error appears, and which troubleshooting steps you have already tried.

Providing clear information can make it easier to identify the cause of the problem.

Final Thoughts

Fixing a Lowrance GPS error often starts with simple checks. Confirm that the device has a clear view of the sky, restart the unit, check the GPS settings, inspect the antenna and power connections, and allow enough time for satellite acquisition.

If the problem continues, check the software, maps, memory card, connected equipment, and possible sources of interference. Avoid performing a full reset unless necessary, especially if you have important customized settings or saved information.

By following these easy troubleshooting steps, you can identify many common causes of Lowrance GPS errors and determine whether the issue can be resolved through basic adjustments or requires further technical support.