ELD Malfunction Rules: What to Do When Your ELD Fails (2026)

Quick Answer

When your ELD malfunctions, notify your motor carrier in writing within 24 hours. Then rebuild your logs for today and the previous 7 days on paper, unless you can pull them from the ELD, and keep logging on paper until it is fixed. Your carrier has 8 days to repair or replace the device, or 5 days to ask FMCSA for an extension (49 CFR 395.34).

Key Takeaways

• The driver must give the carrier written notice of an ELD malfunction within 24 hours of noticing it.
• The driver must reconstruct records of duty status (RODS) for the current 24 hours plus the previous 7 consecutive days, unless the records are already in hand or retrievable from the ELD.
• The carrier must fix, replace, or service the ELD within 8 days of discovering the problem or the driver's notice, whichever comes first.
• A carrier that needs more time must send a signed extension request to the FMCSA Division Administrator in its home state within 5 days of the driver's notice.
• Carriers must keep at least 8 days of blank paper graph-grid logs in every truck, along with a malfunction instruction sheet (49 CFR 395.22(h)).
• A revoked ELD is not a malfunction. The 8-day repair clock does not apply to a device FMCSA has removed from its registered list.

What counts as an ELD malfunction?

Every registered ELD must watch itself for problems and flag them using a standard set of codes from Table 4 of the ELD technical specifications (Appendix A to Subpart B of Part 395). Letters mean a malfunction. Numbers mean a data diagnostic event.

The thresholds above come from section 4.6 of the appendix and FMCSA's malfunction and diagnostic FAQs. The ELD must show a malfunction indicator you can see from the driver's seat, plus a separate indicator for diagnostic events.

What is the difference between a malfunction and a data diagnostic event?

A data diagnostic event is a data inconsistency, often temporary. Under 395.34(c), you follow your carrier's and ELD provider's instructions to clear it. You do not automatically switch to paper.

A malfunction means the device may no longer be compliant. That triggers the 24-hour notice and 8-day repair rules.

Code 5 is the one drivers see most. It sets when more than 30 minutes of driving in a 24-hour period sits under the unidentified driver profile. It clears once unidentified driving for the current day plus the previous 7 days drops to 15 minutes or less. See our guide to unassigned driving time for how to claim or reject those records.

What should a driver do when the ELD malfunctions?

Work through these steps the moment the malfunction indicator lights up.

1. Read the code. A letter (P, E, T, L, R, S, O) is a malfunction. A number (1–6) is a diagnostic event; follow your carrier's instructions for those.
2. Try the simple fixes your provider recommends, such as checking the cable connection or restarting the app, if it is safe to do so.
3. Notify your carrier in writing within 24 hours. Include the date, time, location, truck number, and code. A dated email or message gives you a record.
4. Decide whether you need paper. FMCSA guidance says switch to paper or logging software only if the malfunction stops the ELD from accurately recording your hours of service (11, 14, 60/70, and 30-minute break) and showing them to an officer.
5. Reconstruct your last 8 days. Fill in RODS for the current 24 hours and the previous 7 days on paper graph-grids, unless you already have them or can pull them from the ELD. FMCSA accepts a printout or PDF of the prior 7 days.
6. Keep logging on paper under 49 CFR 395.8 until the ELD is serviced and back in compliance.
7. Keep the paper logs and show them, along with any ELD data, at every inspection until the repair is done.

Owner-operators with their own authority are both the driver and the carrier, so you carry both lists.

What must the motor carrier do, and how fast?

The carrier's clock starts at the earlier of two points: when it discovers the problem or when the driver reports it.

1. Log the driver's notice with the date received.
2. Repair, replace, or service the ELD within 8 days.
3. Make sure the driver is on paper if the failure affects accurate hours recording, and that the truck has blank graph-grids and the malfunction instruction sheet.
4. Request an extension within 5 days of the driver's notice if you cannot finish in 8 days. Send it to the FMCSA Division Administrator for the state of your principal place of business. Office contacts are linked from FMCSA's ELD support page.
5. Wait for FMCSA's written decision. A complete, on-time request keeps you in compliance until FMCSA decides, as long as you and the driver keep following the other parts of 395.34.

The signed extension request must include:

• Your legal name, principal place of business address, and USDOT number (FMCSA asks for these)
• Name, address, and phone number of the person filing
• Make, model, and serial number of each ELD
• Date and location of each malfunction as the driver reported it
• A short statement of your good-faith repair efforts and why you need more than 8 days

Example: your driver emails you a malfunction notice on Monday, October 5. Count conservatively. Your repair deadline is October 13, and any extension request should reach FMCSA by Saturday, October 10.

Can you keep driving on paper logs, and for how long?

Yes, you can keep driving while logging on paper, but only for the repair window. FMCSA's ELD FAQ says paper logging cannot continue for more than 8 days after the malfunction unless FMCSA grants an extension. A driver on paper past 8 days without proof of an extension may be placed out of service.

If the problem clears itself and never affected your hours, FMCSA guidance says the extra documentation steps do not apply. You still report it, review and certify your logs, and your carrier should keep an eye on repeat events.

What happens at a roadside inspection during a malfunction?

Under 395.34(b), you hand the officer your manually kept RODS: the reconstructed 7 days plus today's paper log. If the ELD comes back online partway through the week, FMCSA says to show both the reconstructed paper logs and the ELD data so the officer sees the full 8 days.

Tell the officer about the malfunction up front and show your written notice to the carrier. If the ELD still displays data, our guide on transferring ELD logs at inspection covers the transfer options. Missing logs can become violations; see ELD violations and penalties.

Is a revoked ELD the same as a malfunction?

No. A malfunction is a fault in a registered device. A revocation means FMCSA removed the device from its registered list because it failed the technical standard.

For revoked devices, FMCSA sets the timeline in its announcement. In August 2026, FMCSA revoked five devices and gave carriers 60 days, until October 6, 2026, to replace them. After that date, a truck running a revoked device is treated as having no ELD. The 8-day repair clock and extension process do not cover it. Details are in our post on the five ELDs FMCSA revoked.

The only 2026 change to ELD in-cab paperwork, as of October 2026: a final rule effective July 22, 2026 (91 FR 37050) dropped the requirement to carry the ELD user's manual. The malfunction instruction sheet, the data transfer instruction sheet, and 8 days of blank graph-grids are still required. Section 395.34 itself was not amended in 2025 or 2026. If you are unsure what your device requires, Lucid ELD support can walk you through the malfunction steps for your unit.

Educational content, not legal advice. Confirm requirements against current FMCSA regulations and your state's rules.

FAQ

How long can I drive on paper logs after an ELD malfunction?

Up to 8 days after the malfunction, unless your carrier gets an FMCSA extension. After that, you risk being placed out of service if you cannot show proof of an extension.

Do I still need to carry blank paper logs in 2026?

Yes. Under 49 CFR 395.22(h), carriers must keep enough blank graph-grid RODS in the truck for at least 8 days, plus a malfunction instruction sheet. Only the printed user's manual requirement was dropped in July 2026.

Do I have to rewrite the past 7 days by hand?

Not if the records are retrievable from the ELD or you already have them. FMCSA says a printout or PDF of the previous 7 days is acceptable.

Does a data diagnostic event mean I must switch to paper?

Usually not. For diagnostic codes 1–6, follow your carrier's and ELD provider's instructions to clear the event. Paper is only needed if the problem stops accurate recording of your hours.

Who approves an ELD malfunction extension?

The FMCSA Division Administrator for the state where the carrier has its principal place of business. The carrier must send a signed request within 5 days of the driver's notice.

What does the "S" malfunction code mean?

It is a data transfer compliance malfunction. The ELD failed to confirm its data transfer method on 3 consecutive checks after first logging a data transfer diagnostic event (code 4).