The EZ Lynk AutoAgent is a universal OBD device that lets you monitor engine data, scan and clear DTC codes, and program your vehicle.

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It plugs into the OBD port, with all controls handled through a smartphone app (iOS 8+ & Android 5+). If you purchased a support pack, download the app and create an account. This account is locked to the device, so if ordering for a customer, use their email or have them set it up and share login details.

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Next, link the device to your account and vehicle. This grants access to the tune repository for 4 weeks with the Limited Support Pack or indefinitely with the Full Support Pack.

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Step-by-Step Instructions

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Download for iOS
Get Android App

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Download the smartphone app using the links above
Open the app and create an account
Turn the key to ON/RUN (after ACC and before START)
Plug the AutoAgent into your vehicle's OBD port; you should see a blue and green light illuminated
Connect your phone to the AutoAgent using your phone's WiFi. Scan for WiFi networks and connect to the EZ Lynk_### network
Open the app. If successfully connected to the EZ Lynk WiFi network, vehicle gauges should now appear
Link the AutoAgent with your vehicle. Data is needed for this; if you don't have cellular data, connect your phone to WiFi and reopen the app. If required to enter a technician email, please contact us using this Contact Us page here\n
Load your tune: Click the Menu button > Vehicle > ECU Profiles. Select your tune, download it, click \"Install,\" then \"Proceed\"
Follow the on-screen instructions to complete the tuning process

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❗Note: If you don't have cellular data, disconnect from the device to access the tunes. Download the tune to your device, then reconnect to the EZ Lynk WiFi to install and flash the vehicle.

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EZ LYNK Auto Agent 3: Tune Your Diesel — No Shop, No Wait

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You work on trucks for a living. You don't have time to trailer a build across three counties every time a tune needs a revision. The EZ LYNK Auto Agent 3 was built for exactly that reality — a cloud-connected tuning and diagnostics platform that lets your tuner push calibrations directly to your truck from anywhere in the country. No laptop, no dealership, no middleman. Plug it in, connect the app, and you're in control of your own machine the way it should be.

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American diesel trucks — Ford Powerstroke, Dodge/RAM Cummins, GM Duramax — are some of the hardest-working vehicles ever built. The EZ LYNK platform respects that. This guide breaks down exactly how it works at the mechanical level, what it does that older programmers can't, and which package fits your platform and your build.

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\nNote: EZ LYNK tuning does not support PTO (Power Take-Off) units on any platform. Confirm your application before purchasing.

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What the EZ LYNK Auto Agent 3 Actually Does

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The Auto Agent 3 — sometimes referenced as autoagent 3 or ez lynk auto agent 3.0 — is a Wi-Fi OBD2 dongle that plugs into your truck's diagnostic port and acts as the bridge between the ECM and the EZ LYNK cloud. Your phone connects to the device's Wi-Fi access point through the EZ LYNK app. Your tuner works through the web portal. Everything talks together in real time — no cables, no laptop, no proprietary software you have to fight with.

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What makes the ez lynk tuner different from a handheld programmer is the two-way data flow. A handheld pushes a tune file and the conversation ends there. EZ LYNK keeps it going. Your tuner can pull live data logs off your truck remotely — boost, EGTs, fuel trims, injector pulse widths, transmission data — diagnose what's happening, and push a revised calibration without you ever leaving the property. For off-road builds that go through multiple tuning rounds as hardware gets added, that's a game changer. No more burning half a day hauling the truck back to the shop for a fuel table adjustment.

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Under the Hood: How EZ LYNK Communicates with the ECM

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The Auto Agent 3 connects to the OBD2 port and communicates over the standard J1979 diagnostic protocol, with extended support for manufacturer-specific PIDs on Ford, GM, and Chrysler/RAM platforms. When a calibration gets pushed from the EZ LYNK cloud, the device handles the flash session over the vehicle's CAN bus — the same backbone the factory scan tools use. It manages the flash protocol handshake, security seed/key exchange, and write verification automatically. You don't need a J2534 pass-thru device or a PC running OEM dealer software. The device does the work. You just keep the truck running and let it finish.

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For platforms with tighter factory ECM security — 2018+ RAM trucks and 2017–2018 Duramax L5P — there are additional steps before the flash session can open. Both are covered in the platform sections below.

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Diagnostic Capabilities Beyond Tuning

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The ezlynk auto agent 3 is a full connected scan tool, not just a calibration delivery box. For any diesel shop or serious owner-operator, that matters:

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Read and clear Diagnostic Trouble Codes across all modules — engine, transmission, ABS, body
Log live data parameters and share files directly with your tuner for remote analysis
Monitor real-time streams — boost, EGTs, rail pressure, MAF, fuel corrections — without a separate datalogger
Receive over-the-air firmware updates to the device without any physical connection changes
Give your tuner remote technician access to your truck's live data so they can diagnose issues without being on-site

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For shops running multiple builds at once, the cloud means your tuner has visibility into every connected truck's data from one portal. When a customer calls with a complaint, the tuner pulls the log and sees exactly what happened — no guessing, no back-and-forth over the phone.

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Setup in 60 Seconds

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Plug the Auto Agent 3 into the OBD2 port under the dash.
Install the EZ LYNK app — Android 8.0 or later, iOS 12.0 or later.
Connect your phone to the device's Wi-Fi access point.
Your tuner pushes your calibration to the EZ LYNK cloud. Pull it to the truck through the app.
Flash the tune. Done.

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EZ LYNK for Ford Powerstroke: 6.4L, 6.7L, and 3.0L

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Ford Super Duty owners are some of the most loyal truck people in the country, and the Powerstroke has earned that loyalty. The EZ LYNK platform covers the full Powerstroke lineup from the 2008 6.4L all the way through the 2025 6.7L — over 17 years of hard-working American iron on one cloud platform. If you're spec'ing an ez lynk 6.7 powerstroke setup on a newer Super Duty, the remote delivery model is especially valuable — post-2017 trucks have tighter factory ECM security, and having a tuner who can push revisions remotely as the build grows saves you from chasing appointment slots every time you bolt on new hardware.

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The ez lynk powerstroke 6.7 package covers every generation of the 6.7L — the first-gen 2011–2014 trucks with their single VGT, the refreshed 2015–2019 trucks, and the current 2020–2025 platform with its compound turbo setup. Fueling strategies, boost targets, torque management, and transmission shift calibration differ across these generations, and the ez link tuner ford 6.7 platform gives tuners the toolset to address each one correctly for the actual hardware on the truck — not a generic file built for a stock application.

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The 6.4L Powerstroke (2008–2010) is a different architecture — compound sequential turbos, a 6-speed automatic — but it's well-supported through the same platform. Whether you call it 6.7 powerstroke ez lynk or are working on the older 6.4L, the cloud infrastructure is the same and the remote support model works identically.

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Powerstroke Pickup Coverage

2008–2010 F250, F350 — 6.4L Powerstroke
2011–2012 F250, F350 — 6.7L Powerstroke
2013–2014 F250, F350 — 6.7L Powerstroke
2015–2016 F250, F350 — 6.7L Powerstroke
2017–2019 F250, F350, F450 — 6.7L Powerstroke
2018–2020 F150 — 3.0L Powerstroke
2020–2021 F250, F350, F450 — 6.7L Powerstroke
2022 F250, F350, F450 — 6.7L Powerstroke
2023–2025 F250, F350, F450 — 6.7L Powerstroke

Cab & Chassis Coverage

2008–2010 F350 — 6.4L Powerstroke
2011–2012 F350 — 6.7L Powerstroke
2013–2014 F350 — 6.7L Powerstroke
2015–2016 F350 — 6.7L Powerstroke
2017–2019 F350, F450, F550 — 6.7L Powerstroke
2020–2021 F350, F450, F550 — 6.7L Powerstroke
2022 F350, F450, F550 — 6.7L Powerstroke
2023–2025 F350, F450, F550 — 6.7L Powerstroke

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Shop the Powerstroke Package

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The Ford Powerstroke EZ LYNK 6.7 / 6.4 / 3.0 Tune Package covers every Ford diesel application from 2008 through 2025 across pickups and cab-and-chassis builds. Configure at checkout: add the Auto Agent 3 device or go tune-only if you already own the hardware, then choose a Single Calibration for a focused dedicated build or an SOTF Calibration for switchable power levels on the fly. Full cloud support with no time limits on both options.

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EZ LYNK for Cummins: RAM 6.7L and Nissan Titan 5.0L

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The 6.7L Cummins in a RAM is one of the most respected diesel powerplants on the road — reliable, strong, and one of the most tuner-friendly architectures in the diesel world. The ez lynk auto agent 3 cummins platform covers RAM 2500 and 3500 pickups from 2010 through 2021, RAM 4500 and 5500 cab-and-chassis, and the 2016–2019 Nissan Titan XD with the 5.0L Cummins V8. If you're a Cummins guy, the ezlynk cummins tuner is the platform your community has been waiting for.

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From a calibration standpoint, the 6.7L Cummins across these years spans two distinct ECM families with different tuning approaches. Earlier 2010–2018 trucks use the Bosch EDC17 architecture. The 2019–2021 trucks moved to an updated controller with revised security protocols. The auto agent ez lynk cloud handles both — your tuner works through the same interface regardless of ECM generation, and the device handles the appropriate flash protocol for the platform. You don't have to know the difference. Your tuner does.

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For 2018 and newer RAM trucks, a bypass cable is required — RAM added ECM communication security at the 2018 model year that blocks direct OBD2 flashing without it. The bypass cable ships with every tuner package. It's only a separate purchase if you're buying tune-only and already own the device. Same goes for 2016 and newer Nissan Titans.

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Cummins Full Compatibility

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2010–2021 RAM 2500, 3500 — 6.7L Cummins — Pickup
2010–2021 RAM 2500, 3500 — 6.7L Cummins — Cab & Chassis
2012–2021 RAM 4500, 5500 — 6.7L Cummins — Cab & Chassis
2019–2020 RAM — 68RFE and Aisin transmission variants covered separately
2016–2019 Nissan Titan XD — 5.0L Cummins V8 — Pickup

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Tune file library access on the EZ LYNK Cummins platform is unlimited with no time limits. Add injectors, swap the turbo, upgrade the intercooler — your tuner pushes a revised calibration through the cloud the same day. No shop visit, no new tune purchase, no waiting around. You own your build. You own your tune. That's how it should work.

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\nNote: The Cummins package is available with the physical Auto Agent 3 device included or as a tune-only option. Both choices include Single Calibration or SOTF Calibration with full support.

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Shop the Cummins Package

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The Cummins EZ LYNK 5.0 / 6.7 Tune Package is fully configurable at checkout: add the Auto Agent 3 device or go tune-only, then choose Single Calibration or SOTF Calibration with full support. Bypass cable included for all applicable 2018+ RAM and 2016+ Nissan Titan applications. No expiration on tune file access.

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EZ LYNK for Duramax: LMM, LML, and L5P

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Chevy and GMC HD owners know their trucks — and they know the tuning access story on Duramax has been more complicated than on the Ford or Cummins side, especially with the L5P generation. The l5p tuning ez lynk package is the answer, but 2017–2018 L5P owners need to account for one prerequisite step before ordering.

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The LMM Duramax (2007.5–2010) and LML Duramax (2011–2016) are well-understood platforms with a solid body of tuning knowledge behind them. Both use Bosch ECM hardware with established calibration toolsets. The LML in particular — with its Allison 1000 six-speed and updated common rail fuel system — is a proven platform for serious builds, and the cloud-based revision delivery through ez lynk custom tuning is the right tool for builds that develop over time as hardware gets stacked on.

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The L5P Duramax (2017–2023) is a different situation. GM locked the L5P ECM at the factory level harder than any previous Duramax — tighter than anything on the Ford or Cummins side too. For 2017 and 2018 L5P trucks specifically, a GM E41 ECM Unlock Service is required before any calibration can be written to the ECM — that's true for the EZ LYNK platform and every other tuning solution for this truck. Have your ECM unlocked as a service or buy a pre-unlocked unit. From 2019 forward it's more straightforward. This isn't a workaround — it's a required step, and any honest Duramax tuner will tell you the same thing upfront.

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LMM & LML Coverage

2007.5–2010 Silverado / Sierra 2500HD, 3500HD Pickup — LMM
2011–2014 Silverado / Sierra 2500HD, 3500HD Pickup — LML
2011–2014 Silverado / Sierra 3500HD Cab & Chassis — LML
2015–2016 Silverado / Sierra 2500HD, 3500HD Pickup — LML

L5P Coverage

2017–2019 Silverado / Sierra 2500HD, 3500HD Pickup — L5P
2020–2021 Silverado / Sierra 2500HD, 3500HD Pickup — L5P
2022–2023 Silverado / Sierra 2500HD, 3500HD Pickup — L5P
2017–2018 requires GM E41 ECM Unlock Service before tuning

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\nNote: An LM2 EZ LYNK tune package for the 3.0L inline-six Duramax in half-ton Silverado and Sierra trucks is on the way. Check the product page below—this exciting new option will be released as a selectable variant within the same product, making it easier than ever to upgrade when it drops.

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Shop the Duramax Package

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The GM Duramax LMM / LML / L5P EZ LYNK Tune Package covers 16 years of HD Silverado and Sierra trucks. Configure at checkout: add the Auto Agent 3 device or go tune-only, then choose Single Calibration or SOTF Calibration with full cloud support and no time limits. 2017–2018 L5P owners need the ECM unlock completed before the tune can be delivered — factor that into your build timeline.

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Single Calibration vs. SOTF: Which Tune Type Is Right for Your Build

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Every package across all three platforms gives you the same two checkout choices: add the Auto Agent 3 device or tune-only, and Single Calibration or SOTF (Shift-on-the-Fly) Calibration. Here's the straight answer on which one you actually need.

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A Single Calibration is one optimized tune written around your truck's exact hardware — injector size, turbo specs, fueling targets, transmission parameters. Your tuner dials it in for how the truck is built and how it's used. Build changes? The tuner pushes a revised calibration through the cloud. You're not locked in, and you're not cutting a check for a new tune file every time you swap a part. For most dedicated builds with a clear purpose, this is the right call.

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An SOTF Calibration gives you multiple power levels switchable on the fly while driving — no stopping, no reflashing. The typical setup is two or three levels: a conservative tow tune, a mid-level work calibration, and a full-pull level. Each one is a complete tuner-developed calibration, not a fuel adder bolted on top of a base file. More tuner development time, priced accordingly. For a truck that genuinely pulls double or triple duty, SOTF earns every dollar.

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Both options on all three platforms include full support with unlimited tune file library access and no time limits. The ezlynk tuner cloud keeps your tuner connected to your build for as long as the truck is running. No subscriptions, no clocks ticking down, no gotchas.

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Frequently Asked Questions

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What is the difference between the Auto Agent 3 and the Auto Agent 2?

The Auto Agent 3 is the current generation hardware with improved wireless stability, faster data throughput, and broader vehicle coverage compared to the earlier autoagent 2. All current tune packages are built around the Auto Agent 3. If you're starting a new build, spec the current hardware.

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How does the EZ LYNK platform flash the ECM without a laptop or J2534 device?

The Auto Agent 3 handles the entire flash session internally — seed/key security exchange, CAN bus communication, write verification — all managed by the device firmware over the OBD2 connection. The EZ LYNK app on your phone is the user interface, but the device itself is doing the heavy lifting. No PC, no J2534 pass-thru, no OEM software.

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Why does my 2018 or newer RAM Cummins need a bypass cable?

Starting with the 2018 model year, RAM added a security layer to the ECM communication bus that blocks direct OBD2 flash sessions. The bypass cable reroutes the connection to allow calibration delivery. It comes included with every tuner package — it's only a separate purchase if you're buying the tune file alone and already own the ezlynk auto agent 3.

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Why do 2017–2018 Duramax L5P trucks need an ECM unlock before tuning?

GM locked the L5P ECM at the factory level more aggressively than any previous Duramax. The lock prevents any third-party calibration from being written without an unlock service first. Once unlocked — via a service or a pre-unlocked replacement ECM — the l5p tuning ez lynk process is the same as any other supported platform. 2019 and newer L5P trucks don't require this step.

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Can my tuner actually see my truck's live data remotely through EZ LYNK?

Yes — that's one of the core advantages of the ez lynk platform over standalone programmers. As long as the Auto Agent 3 is connected to the truck and your phone has a data connection, your tuner has remote access to your live parameter data through the cloud portal. They can pull your data logs, review what the truck is doing in real time, and push a revised calibration — all without you bringing the truck in.

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Does EZ LYNK work with both iOS and Android?

Yes. The EZ LYNK app runs on Android 8.0 or later and iOS 12.0 or later, including iPad. The web portal works from any browser for tune management and data review on a desktop or laptop.

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What does SOTF actually mean at the calibration level — is it just a fuel adder?

No — each SOTF power level is a complete calibration in its own right. Different fueling maps, different boost targets, different torque management curves, different transmission parameters. It's not a simple percentage adder on top of a base tune. That's why SOTF requires more tuner development time and reflects in the price. For a truck with genuinely different use cases across those power levels, it's the right tool. For a single-purpose build, a well-developed Single Calibration is typically the cleaner approach.

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Does EZ LYNK work on PTO-equipped trucks?

No. Tuning does not support PTO units on any platform — Powerstroke, Cummins, or Duramax. Confirm your application before purchasing.

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Browse the Full EZ LYNK Collection

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Ford, Dodge, or GM — your truck, your build, your tune. The complete EZ LYNK lineup is in one place. Pick your platform, choose your tune type, and decide whether to bundle the Auto Agent 3 hardware or add it to a package you already own. No subscriptions. No expiration. No dealership. Just a direct line between you, your tuner, and your truck — the way American diesel ownership should work.

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Disclaimer

The information in this article is provided for informational purposes only and is intended for off-road and closed-course competition use only. Operating a modified vehicle on public roads may violate federal, state, and local laws and regulations. It is the sole responsibility of the vehicle owner and operator to ensure their vehicle complies with all applicable laws. Nothing in this article constitutes legal advice.

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