PPEI ERROR CODE FINDER

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EFI ERROR CODES

Additional Resources

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Additional Resources

EZLYNK HELP

EZLYNK WiFi Not Broadcasting

Issue: The EZLYNK device isn’t broadcasting a WiFi signal (e.g., "EZLYNK_XX"), so you can’t connect via the app.

Suggestions:

  • Unplug the EZLYNK device from the OBD-II port, wait 60 seconds, then plug it back in.
  • Check for a blue light on the device—if it’s not lit, the device may be faulty.
  • Inspect the OBD-II port for bent pins or debris that might prevent a proper connection.
  • If the issue persists, contact EZLYNK support for a potential firmware update or device replacement.

Unable to Connect to EZLYNK Network

Issue: You see the "EZLYNK_XX" network but can’t connect, or it says "Unable to connect."

Suggestions:

  • Ignore the "No Internet Connection" message on your phone—it’s normal since the EZLYNK network connects to the vehicle, not the internet.
  • Restart your phone and the EZLYNK device (unplug and replug into the OBD-II port).
  • Ensure you’re within WiFi range (close to the vehicle) and there’s no interference from other networks.
  • If the issue persists, update the EZLYNK app to the latest version and retry.

Cannot Communicate with ECM

Issue: The EZLYNK app shows "Unable to communicate with your vehicle" when trying to stream data or tune.

Suggestions:

  • Turn the vehicle’s key to the "Run" position (without starting the engine) to boot the ECM before connecting the EZLYNK device.
  • Ensure the EZLYNK device is securely plugged into the OBD-II port.
  • Check for any loose connections or damaged cables between the device and the port.
  • If the issue continues, verify the ECM is not locked (e.g., similar to `$0333`) and contact your technician.

Firmware Update Failure

Issue: The EZLYNK device disconnects during a firmware update, leaving it in an unstable state.

Suggestions:

  • Unplug the EZLYNK device from the OBD-II port, wait 30 seconds, then plug it back in.
  • Connect to the EZLYNK app and check the firmware version under the "About" page in the "Settings" tab.
  • If the firmware didn’t update, ensure a stable internet connection and retry the update.
  • Contact EZLYNK support if the device remains unresponsive.

Tune Installation Stalls at 0%

Issue: When installing a tune via the EZLYNK app, the progress bar stalls at 0%.

Suggestions:

  • This often happens due to incomplete data downloads over cell data or unstable networks.
  • Unplug the EZLYNK device, connect your phone to a stable WiFi network, and fetch the tune profile again via the "Cloud" button in the app.
  • Plug the device back in and retry the installation.
  • Ensure your vehicle’s battery is charged or connected to a charger, as low voltage can interrupt the process.

WHAT TRUCK DO I HAVE?

Duramax

01-04 - LB7 (E54)

04-05 - LLY (E60)

06-07 - LBZ (E35A)

07-10 - LMM (E35B)

11-14 - LML (E86A)

15-16 - LML (E86B)

Cummins

03-07 - 5.9L (CMB)

07-09 - 6.7L (CMC)

10-12 - 6.7L (CMD)

13-18 - 6.7L (CME)

FAQs

Q: How do I find my truck’s ECM type?
A: Check the service parts identification sticker in your glovebox or use a scan tool like EFILive to read the ECM ID.

Q: Can I tune a locked ECM?
A: Some locked ECMs require a bench flash—see error $0333 for steps or contact PPEI support.

Q: What if my truck isn’t listed?
A: Email zach@ppei.com with your VIN for compatibility info.

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