Dash Cam Not Working? 5 Quick Fixes for Common Problems [2026 Guide]

Quick Summary / TL;DR: Is your dash cam freezing, randomly rebooting, or failing to record? Before you panic or wait hours for customer service, most dash cam glitches can be solved in minutes. In this guide, we walk you through the top 5 easiest troubleshooting tips:

1. Formatting or replacing your SD card to fix recording failures.

2. Adjusting G-sensor settings when your memory card constantly says "Full."

3. Checking your power supply to eliminate screen flickering or freezing.

4. Securing loose cables and disabling Parking Mode to stop random reboots.

5. Identifying metallic window tints or cheap chargers that block your GPS signal. Read on to learn how to keep your dash cam running smoothly so you never miss a crucial moment on the road!

Five tips to quickly eliminate common problems for your Dash Cam

PREFACE

With so many unpredictable drivers on the road today, a dash cam has become an absolute necessity. In fact, driving without one can feel just as anxiety-inducing as leaving home without your smartphone! But what happens when you’re out on the road and realize your dash cam isn't recording or turning on? Frustration sets in. While contacting customer service is an option, they might just tell you to press the "Reset" button or may not be available outside of working hours.

So, what should you do? Today, we are going to teach you how to easily and quickly troubleshoot your dash cam on your own. Be sure to share this guide with friends and family who use dash cams—because discovering your camera wasn't working right after an accident is a nightmare no driver wants to experience.

1. DASH CAM STOPS RECORDING FOR NO REASON

If your dash cam suddenly stops recording, the first culprit to check is the memory card (microSD card). Often, the card hasn't been formatted correctly, or it contains hidden files not generated by the dash cam, which disrupts the system. To fix this, simply use the "Format" function built into your dash cam.

If formatting doesn't solve the issue, remember that memory cards have a limited lifespan. Because they constantly rewrite data, they wear out over time. We highly recommend using cards specifically designed for continuous recording, such as the SanDisk High Endurance series, and replacing them annually.

Additionally, if you use an OTG card reader to view footage on an Android or iOS phone, your phone's operating system might leave temporary files on the card. Always reformat the card inside the dash cam after viewing your files. A faulty or worn-out SD card will frequently cause the device to freeze or stop recording, so keeping a formatted spare card in your glovebox is a smart backup plan. If formatting fails completely, the card is likely corrupted and must be replaced.

2. MEMORY CARD CORRUPTED OR FULL

Building on the previous point, if your dash cam displays a warning prompt, try formatting the card inside the device first. If that doesn't work, insert the memory card into your PC or Mac and format it there. Crucial tip: For cards 64GB and larger, you must choose the exFAT format. Many outdated online articles recommend FAT32, but that format is only stable for cards 32GB or smaller. Forcing a 64GB+ card into FAT32 can cause read/write errors and ultimately corrupt the card.

What if the prompt says "Memory Card Full"? Don't panic. Modern dash cams feature "Loop Recording," meaning they automatically delete the oldest footage to make room for new files. However, if the G-sensor (vibration detection) is too sensitive, normal driving bumps will be registered as "accidents," locking those files into a protected folder that loop recording cannot overwrite. When this protected folder gets full, the camera stops recording. Simply format the card to clear the locked files, and lower your G-sensor sensitivity in the menu to prevent it from happening again.

Always purchase high-endurance memory cards from trusted brands and reputable retailers to avoid counterfeit products, which fail quickly and risk your footage.

3. DASHCAM FREEZES, BOOTS TO BLACK / WHITE SCREEN, LCD FLICKERS

If your dash cam freezes, powers on to a solid black or white screen, or the LCD flickers, start by removing the memory card. Turn the device on again. If it boots up normally without the card, your memory card is the problem and needs to be replaced.

If the issue persists without the SD card, the problem is almost certainly your power supply. An unstable power connection will cause freezing, screen glitches, and flickering.

If you are using a multi-socket 12V splitter, remove it. Plug the dash cam's power cable directly into the car's main cigarette lighter socket to see if it works. Often, cheap splitters fail to provide consistent voltage. Similarly, if you are using a generic USB cable and a USB car charger, swap it out for the dash cam's original 12V power cable. Generic USB data cables usually supply a maximum of 500mA, which is far too weak for a high-performance dash cam.

Using old power cables from previous dash cams is also a bad idea. Cheap aftermarket cables often lack proper inspection, resulting in insufficient current, voltage drops, and even electromagnetic interference that can fry your device. For maximum lifespan and stability, always use the original power cable provided by the manufacturer.

4. DEVICE REBOOTING ITSELF WHILE IN USE

If your dash cam randomly turns off and on while you are driving, the first thing to check is the physical connection. A power plug might look completely inserted, but if it's even slightly loose, the constant vibrations of driving will cause the power to rapidly disconnect and reconnect, leading to automatic reboots. Push the car charger firmly into the socket.

If the connection is tight but the rebooting continues, enter your dash cam's settings menu and check if "Parking Mode" (or Parking Monitor) is turned on. If you have not installed a dedicated Hardwiring Kit connected to your car's battery, you must leave this feature turned off. Modern dash cams use supercapacitors (or small internal lithium batteries) that only hold enough charge to safely save the last file when the car turns off. Without a hardwired constant power source, enabling Parking Mode will confuse the dash cam and cause it to turn on and off continuously until the internal power is entirely drained.

Learn how to install a Hardwiring Kit to your car for permanent power (Always Hot): HOW TO HARDWIRE DASH CAM INSTALLATION GUIDE STEP-BY-STEP

5. GPS LOGGER UNABLE TO SYNC WITH DASH CAM

If your GPS logger isn't locking onto a signal, first consider your environment. Bad weather, dense forests, or tall city skyscrapers can easily block satellite signals.

If you're in an open area and still have no signal, check your vehicle's window tint. Many premium window tints contain metallic components that completely block GPS signals from passing through the glass. In this case, you may need to purchase an external GPS signal amplifier.

If neither the environment nor your tint is the issue, you are likely experiencing electromagnetic interference (EMI) inside the cabin. As mentioned in section 3, low-quality third-party car chargers or USB adapters leak heavy interference that blocks GPS frequencies. To test this, swap your power supply back to the original factory cable plugged directly into the 12V socket. If the GPS syncs, the third-party charger was the culprit.

Learn more about GPS Logger positioning: FOUR FACTORS THAT AFFECT GPS LOGGER POSITIONING QUALITY OF DASH CAMS

IN CONCLUSION

The troubleshooting steps above cover the most common issues drivers face with their dash cams. To drastically reduce the chances of encountering these glitches, follow the golden rules: always use the original car charger, invest in a name-brand High Endurance memory card, and regularly format your card and review your footage. Keeping a spare formatted memory card in your glovebox ensures you are always protected when the unexpected happens!

Of course, starting with a high-quality, reliable dash cam makes all the difference. We welcome you to experience our UltraDash dash cams, which have earned exceptional reviews across the U.S. and Taiwan. If you ever run into any issues with our products, contact us directly, and our support team will get you back on the road safely and quickly!

Learn more:

UltraDash C1. The Best Value For Your Money

7 Reasons Why you need a Dash Cam

7 Easy Steps to Install a Dash Cam Yourself

How to Hardwire Dash Cam Installation Guide Step-by-step

The 5 Myths of Wi-Fi Function on Dash Cams

How to Use OTG Device with Phone to Watch, Edit and Share Dash Cam Footage

Four Factors that Affect GPS Logger Positioning Quality of Dash Cams

Five Key Points of Choosing a Dash cam for Ridesharing Taxi, Uber and Lyft Driver

Five Simple Ways To Troubleshoot Common Dashcam Glitches

Does TESLA need an additional dash cam?

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How to Reduce Jello Effect Caused by Car Vibrations in The Footage Recorded by A Dash Cam?

6 Tips to Select the Best SD Card for Your Dash Cam