ELD Malfunction: What to Do in 8 Days (Step by Step)
Rules, prices and device details on this page were checked October 2026 against the official sources listed at the bottom. Where a provider doesn't publish a number, we say so instead of guessing.
Sooner or later, an ELD will act up. A tablet dies, a cable comes loose or the device loses its connection to the engine. When it happens on the road, you don't want to be guessing what the rules say. This guide walks through exactly what drivers and carriers have to do under 49 CFR 395.34, checked October 2026.
FMCSA Malfunction Rules
First, know the difference between a malfunction and a data diagnostic event. ELDs are required to monitor themselves. When something goes wrong, they flag it in one of two ways:
- Data diagnostic event: a data inconsistency that the ELD detects, like a missing data element or a short loss of engine connection. You follow your carrier's and provider's instructions to fix it, and you can usually keep using the ELD.
- Malfunction: a bigger problem that means the ELD can't be trusted to keep a compliant record. The ELD technical rules list the categories: power, engine synchronization, timing, positioning, data recording and data transfer. For example, the appendix says an ELD has to set an engine synchronization malfunction if it loses connection to the required engine data for more than 30 minutes during a 24 hour period, and a power malfunction if it understates driving time by 30 minutes or more over 24 hours.
A malfunction is what triggers the 395.34 steps below.
Step by Step: What to Do
Step 1: Note the malfunction
Write down what happened, when and where. Note the indicator or code the ELD showed. Take a photo of the screen if you can. This helps your carrier, the provider and any officer who checks you later.
Step 2: Tell your carrier in writing within 24 hours
Under 395.34(a)(1), the driver has to give written notice of the malfunction to the motor carrier within 24 hours. A text or email works well because it's dated. If you're an owner operator running under your own authority, you're the carrier, so keep a written note for your own file.
Step 3: Reconstruct the last 8 days
You need to rebuild your record of duty status for the current 24 hour period and the previous 7 consecutive days. You do this on graph grid paper logs that meet 395.8. There's an exception: if you already have those records, or you can pull them off the ELD, you don't need to redo them by hand.
Step 4: Keep paper logs until it's fixed
Keep logging by hand, every day, until the ELD is serviced and working again.
Step 5: Hand over paper logs at inspection
If you're inspected during a malfunction, show the officer your paper records for the reconstructed days and every day since. Also show the malfunction note.
Paper Logs During a Malfunction
Every truck should already have what you need. Under 395.22(h), carriers have to keep an ELD information packet on board, including an instruction sheet for handling malfunctions and a supply of blank graph grid paper logs to cover at least 8 days. Check yours now. A lot of drivers find out on a bad day that the packet's missing or the logs are used up.
When you fill in paper logs, be complete. Each day needs your name, date, the vehicle number, the carrier name and main office address, total miles, the 24 hour grid with your duty status changes, the location of each change, and your signature. Total each status line so it adds up to 24 hours.
A few tips that make inspections go smoother:
- Use the same time zone as your home terminal, just like the ELD did.
- Write locations clearly: a city and state, or a highway and mile marker.
- Note "ELD malfunction" and the date it started on each paper log.
- Keep the logs in order with the newest on top.
Notifying Your Carrier
The carrier's clock starts when they find out. Under 395.34(d)(1), the motor carrier must take action to correct the malfunction within 8 days of discovering it or the driver's notification, whichever comes first. That's 8 days to repair, replace or service the device, not 8 days to start thinking about it.
What carriers should do right away:
- Log the driver's notice with the date and time received.
- Call the ELD provider's support line. Many problems are fixed with a reset, a new cable or an app update.
- If it's hardware, get a replacement shipped. Many providers keep spares ready.
- Track the 8 day deadline on a calendar.
- Keep the driver's paper logs with the ELD records for the same period.
It's worth keeping a spare device or two in the office if you run more than a handful of trucks. Swapping in a spare can end a malfunction the same day.
Getting an Extension
Sometimes 8 days isn't enough. Parts are backordered, or a provider can't ship in time. The rule allows for that, but you have to ask, and fast.
Under 395.34(d)(2), the carrier must notify the FMCSA Division Administrator for the state of its principal place of business within 5 days after the driver notifies the carrier. The request must be signed by the carrier and include:
- The name, address and phone number of the person filing the request
- The make, model and serial number of each ELD
- The date and location of each malfunction as reported by the driver
- A short statement of what the carrier has done to repair, replace or service the ELDs, and why more time is needed
If FMCSA agrees the carrier is making a good faith effort, it may allow more time and will send a written decision, which can include conditions. Under 395.34(d)(5), a carrier that files a request meeting these requirements is treated as compliant with the ELD requirement while the request is pending.
How to Avoid Repeat Malfunctions
- Check cables and connectors during your pre trip. A loose diagnostic port connection is a common cause.
- Keep phones and tablets updated and charged, and use a mount that keeps them powered.
- Make sure the device you're using is still on FMCSA's registered list. A revoked device is a different problem, with a different deadline.
- If the same unit keeps failing, ask your provider for a replacement or compare ELD quotes for a more reliable setup.
For the bigger picture on what the mandate requires, read our ELD mandate guide and our hours of service guide.
Frequently Asked Questions
How long can I drive with a malfunctioning ELD?
The carrier has 8 days from discovering the problem or from the driver notification, whichever is first, to correct it. You can drive on paper logs during that time. Longer needs an approved extension from FMCSA.
Do I have to reconstruct my logs?
Yes, for the current 24 hours and the previous 7 days, unless you already have the records or can retrieve them from the ELD.
Who do I ask for an extension?
The FMCSA Division Administrator for the state where the carrier has its principal place of business. The request must be made within 5 days after the driver notifies the carrier.
Is a data diagnostic event the same as a malfunction?
No. A data diagnostic event is a data inconsistency you resolve by following the carrier and provider instructions. A malfunction triggers the 24 hour notice, paper logs and the 8 day repair window.
Sources
All prices, terms and registration details were checked October 2026 on the pages below. Providers change pricing often, so confirm before you buy.