Truck Fault Codes

ELD Timing Malfunction Explained

An ELD timing malfunction relates to the device's ability to keep required time accuracy. If the device time is not properly synchronized, logs can become unreliable or noncompliant.

Code Details

Structured details for ELD Timing Malfunction
Display codeELD Timing Malfunction
SPNNot applicable or not verified
FMINot applicable or not verified
OEM codeNone listed
ManufacturerFMCSA
SystemElectronic Logging Device
ComponentTime synchronization
Source addressUnknown or not applicable
Severitymedium
Review statusai source checked
Source confidencehigh
Last reviewed2026-05-05

Plain-English Meaning

ELD records depend on accurate time. A timing malfunction means the device can no longer meet the timing requirement used for electronic logs.

FMCSA guidance describes timing compliance in relation to synchronization with Coordinated Universal Time and allowable time deviation.

Common Symptoms

  • ELD time appears wrong
  • Events appear out of order
  • Timing malfunction indicator
  • Certification or transfer issues may appear

Possible Causes

Possible causes may include the items below. The list is not a parts diagnosis.

  • Device clock or time source may be incorrect
  • App or firmware may not be synchronizing time
  • The device may lack network or GNSS assistance depending on product design
  • Account or vehicle timezone display settings may be confusing the user

First Checks

  • Confirm whether the ELD is showing a malfunction indicator, a data diagnostic indicator, or both.
  • Record the displayed category, event time, vehicle, driver, and any related messages before clearing anything.
  • Follow the motor carrier's and ELD provider's instructions for data diagnostic events.
  • For malfunctions, notify the carrier and verify recordkeeping steps against current FMCSA requirements.

Can I Keep Driving?

This is a logging and compliance issue. Do not rely on inaccurate logs; follow carrier and ELD provider instructions.

ELD Data Recording MalfunctionElectronic Logging Device · Record storage and retrievalELD Data Transfer MalfunctionElectronic Logging Device · Roadside data transfer

Related Lookup Pages

Sources

  • ELD Malfunctions and Data Diagnostic Events Federal Motor Carrier Safety Administration · government · accessed 2026-05-05 · confidence high

    Source: Federal Motor Carrier Safety Administration, ELD Malfunctions and Data Diagnostic Events. This page paraphrases factual fields only and is not a substitute for the original document.

    Open source
  • 49 CFR Part 395 Appendix A to Subpart B - Functional Specifications for ELDs Electronic Code of Federal Regulations · government · accessed 2026-05-05 · confidence high

    Source: Electronic Code of Federal Regulations, 49 CFR Part 395 Appendix A to Subpart B - Functional Specifications for ELDs. This page paraphrases factual fields only and is not a substitute for the original document.

    Open source

FAQ

Is a timing malfunction the same as an engine fault code?

No. ELD malfunction and data diagnostic categories relate to electronic logging compliance and recorded hours-of-service data. They may involve vehicle data, but they are not the same thing as an engine ECM DTC.

Can this page replace the ELD provider's instructions?

No. ELD products vary, and the provider's instructions and the motor carrier's procedures should be used for the specific device.

Should a driver ignore an ELD data diagnostic event?

No. A data diagnostic event signals a data inconsistency. FMCSA guidance says the driver should follow the motor carrier's and ELD provider's recommendations to resolve it.