Quick Facts:
- Best bidirectional scan tool for most truck owners: Innova 5610, with no subscription and free updates.
- What bidirectional means: the tool sends commands to parts such as the ABS pump, fuel pump and cooling fans, then shows the result.
- Truck jobs covered: ABS bleeding, DPF and AdBlue resets, TPMS relearn, tire size reset and steering angle calibration, with coverage varying by vehicle.
- Prices checked: $349.99 to $599.99 across our four picks on October 29, 2026.
- Update costs: free on the Innova 5610 and TOPDON ArtiDiag900 Lite; yearly renewals on Autel and XTOOL after the free period.
- 2018 and newer Jeep and Ram: clearing codes takes a tool with FCA AutoAuth support plus an AutoAuth account.
9 min read
In This Guide
- Why the Best Bidirectional Scan Tool Saves You Money
- What a Bidirectional Scan Tool Does a Code Reader Won’t
- Best Bidirectional Scan Tool Picks Compared
- Innova 5610: Our Pick for No-Subscription Owners
- Best Truck Jobs for a Bidirectional OBD2 Scanner
- Innova 5610 vs. Autel, TOPDON and XTOOL Tablets
- How to Run Active Tests Safely
- Final Thoughts
- Best Bidirectional Scan Tool FAQ
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Our Best Bidirectional Scan Tool Picks
- Best for no-subscription owners: Innova 5610, $349.99 at Amazon (price checked October 29, 2026). Check price at Amazon.
- Top tablet with built-in AutoAuth: Autel MaxiCOM MK808S, $389 at Autel’s online store (price checked October 29, 2026).
- Free lifetime updates on a tablet: TOPDON ArtiDiag900 Lite, $459 at TOPDON (price checked October 29, 2026).
- Best for Toyota owners who want dealer-level depth: XTOOL D8BT V3.0, $599.99 at Amazon (price checked October 29, 2026).
4wdTalk earns no commission on the Autel, TOPDON or XTOOL tools.
Why the Best Bidirectional Scan Tool Saves You Money
A trouble code names a suspect, not a proven failure. So you buy a purge valve, clear the code and watch it return. The best bidirectional scan tool ends the guesswork. It commands the ABS pump, fuel pump or fans and shows how each responds. As a result, you confirm the fault in your driveway before you buy a part or pay a shop.
Truck owners gain the most. For example, a shop quoted one diesel owner about $200 for a forced DPF regeneration. A bidirectional tool runs the same job from the driver’s seat on supported trucks. Similarly, ABS bleeding, tire size resets and steering angle calibration all require commands sent to the truck’s modules.
This guide is research-based; we have not tested these tools hands-on. Instead, we dug deep into Reddit, truck and Jeep forums, and Amazon owner reviews. Two things decide most purchases: vehicle coverage and update fees. I drive a 2025 Chevy Colorado ZR2, so a tool with no renewal bill tops my list.
What a Bidirectional Scan Tool Does a Code Reader Won’t
A basic OBD scanner reads codes, freeze-frame data and live sensor values. However, it only receives data. A bidirectional tool also sends commands through active tests and special functions.
Generic OBD2 includes a command mode. The SAE J1979 standard defines Service $08 for control of an on-board component. In practice, Snap-on’s OBD2 service mode notes say it typically covers the EVAP vent and purge solenoids.
Everything else comes from manufacturer-specific diagnostics. Each tool maker licenses or builds ABS, regen and relearn functions brand by brand. Consequently, support changes with year, make, model and engine. Innova’s data shows one tool running 15 active tests on a 1997 4Runner and 45 on a 2020 4Runner.
Before you buy, enter your truck in the maker’s coverage checker, such as Innova’s coverage checker. A listed function does you no good if your truck shows “not supported.” Owners of several brands raise this complaint in reviews and forums.
Your scan tool reads the module, not the wire. Next, a meter and test light confirm the circuit or part it flags. ABS bleeding also pairs the tool’s routine with a manual bleed. The Klein MM420 multimeter, Mityvac MV8500 bleeder kit and JASTIND test light cover this follow-up work.
Follow-Up Tools for What the Scan Tool Finds
Klein Tools MM420 Auto-Ranging TRMS Digital Multimeter | 600V AC/DC…
Mityvac MV8500 Silverline Elite Automotive Brake/Clutch Bleeding
Heavy Duty 6-24V Automotive Circuit Tester w/Replacement Indicator …
Best Bidirectional Scan Tool Picks Compared
Here are our four best bidirectional scan tool picks, with published specs and prices checked October 29, 2026.
| Tool | Type and Screen | Service Functions | Updates | FCA AutoAuth | Warranty | Price (checked Oct 29, 2026) |
|---|---|---|---|---|---|---|
| Innova 5610 (top pick) | Handheld, about 3.5-inch color screen | 35 listed | Free, no subscription | No | 1 year | $349.99 at Amazon |
| Autel MaxiCOM MK808S | Tablet, 7-inch touchscreen | 28 or more | 1 year free, then $103 a year | Yes | 1 year | $389 at Autel’s online store |
| TOPDON ArtiDiag900 Lite | Tablet, 8-inch touchscreen | 8 | Free lifetime | Listed by sellers; confirm with TOPDON | 1 year | $459 at TOPDON |
| XTOOL D8BT V3.0 | Tablet, 8-inch screen | 41 resets plus ECU coding | 3 years free, then optional $199 a year | Yes | 2 years | $599.99 at Amazon |
Two factors matter more than screen size. First, the update policy sets your cost in year two. Renew the Autel once and it totals $492; the Innova stays at $349.99. Second, AutoAuth support decides whether the tool clears codes on a 2018 or newer Jeep or Ram.
Innova 5610: Our Pick for No-Subscription Owners
The Innova 5610 is a handheld with buttons and a color screen of about 3.5 inches. Innova says it scans all systems, including engine, transmission, ABS and SRS. You also get OEM live data with graphing. Updates are free, and Innova charges no subscription.
Best Truck Functions on the 5610
Innova lists 35 special functions. For truck owners, the useful ones include ABS bleeding, DPF, AdBlue and NOx sensor resets, and TPMS relearn. Tire size reset, steering angle calibration and transmission reset also make the list. In addition, active tests command the fuel pump, injectors, cooling fans and ABS pump.
Owner reports support the listing. For instance, a 2021 Ram 6.7 owner on RamForum reported accurate DEF temperature and quality readings. Amazon reviewers also call it an invaluable tool for DIY work. Innova’s free RepairSolutions2 app adds verified fixes, recalls and unlimited saved scans.
Where the 5610 Falls Short
The trade-offs are real. Innova lists engine and transmission active tests for seven brands, while other modules vary by vehicle. A JeepForum member relays reports of missing Jeep body modules. Amazon reviewers also flag functions showing as unsupported on their vehicles.
The 5610 lacks FCA AutoAuth support. On a 2018 or newer Jeep, Ram or Dodge, it reads live data and runs a TPMS relearn. However, Innova says it won’t erase codes or run oil or battery resets there. Heavy-duty trucks need Innova’s HD adapter. Finally, new model-year coverage lags by up to a year, according to Innova.
For me, the free updates outweigh the small screen for most half-ton and midsize truck owners. Own a 2018 or newer Jeep or Ram? Read the tablet section first.
Run Active Tests on Your Truck With the Innova 5610
Bidirectional handheld with 35 listed service functions, including ABS bleeding, DPF and AdBlue resets, TPMS relearn and steering angle calibration. Coverage varies by vehicle, so run Innova's coverage checker first.
Check Price at AmazonBest Truck Jobs for a Bidirectional OBD2 Scanner
Four jobs justify the cost for most truck, Jeep and SUV owners. Each one needs the tool to command a module.
ABS Bleed After Brake Work
Modern ABS systems trap air in the hydraulic unit. During an ABS bleed, the tool cycles the pump and valves to push the air out. However, Innova’s support notes say the routine almost always pairs with a manual brake bleed. Several Tacoma World owners shop for a bidirectional tool to run an ABS bleed.
Forced Regens and Diesel Resets
Diesel trucks with a DPF need an occasional forced regeneration. One r/Diesel owner says his bidirectional Autel makes forced regens easy. The Innova 5610 lists DPF, AdBlue and NOx sensor resets. Tune your diesel? Read our guide to diesel tuners and programmers first, since a tuner does a different job.
Relearns After Bigger Tires or a Lift
Bigger tires alter speedometer calibration and shift calibration. A lift or alignment also moves the steering angle sensor’s zero point. As a result, owners run tire size resets, steering angle calibration and TPMS relearns themselves. Innova lists all three functions for the 5610, though support varies by truck.
EVAP Purge and Vent Tests
EVAP codes are common and frustrating. Because Service $08 typically covers the EVAP solenoids, entry-level bidirectional tools command them on many vehicles. Therefore, you confirm a stuck purge valve before you buy one. After a rough trail, a run through our post-trail inspection checklist catches loose caps and damaged hoses.
Innova 5610 vs. Autel, TOPDON and XTOOL Tablets
So which tool runs these jobs best? The 5610 wins on running cost. In contrast, the tablets lead on screen size, and the Autel and XTOOL add coverage depth and AutoAuth. Tacoma World owners praise Autel, Launch and XTOOL tablets for broader coverage and deeper bidirectional control.
When a Tablet Is the Best Choice
Pick the Autel MaxiCOM MK808S for a newer Jeep or Ram. It has a 7-inch touchscreen, and Amazon sellers list more than 3,000 active tests. Autel’s online store sells it for $389 (price checked October 29, 2026). Updates are free for one year, then $103 a year. Owners note the tool keeps working when updates lapse.
Pick the TOPDON ArtiDiag900 Lite for a big screen with free lifetime updates. It sells for $459 at TOPDON (price checked October 29, 2026). Choose the XTOOL D8BT V3.0 for Toyota depth and ECU coding, with three free years of updates. Amazon sells it for $599.99 (price checked October 29, 2026). One Tacoma World owner says his XTOOL tablet does everything Toyota’s Techstream software does.
The 2018 and Newer Jeep and Ram Problem
FCA added a secure gateway module to most 2018 and newer Jeep, Ram and Dodge vehicles. To clear codes through it, you need an AutoAuth-ready tool, internet access and an AutoAuth account. Autel lists the account at $50 a year. The brand also requires an active software subscription for AutoAuth. As a longtime Jeep owner, I’d settle the gateway question first on any newer Jeep or Ram. See our Ford vs. Jeep reliability data for what those trucks need most.
How to Run Active Tests Safely
Active tests move real parts, so treat them like any shop procedure. Autel’s MK808S manual sets these basic rules.
- Put an automatic in Park or a manual in Neutral, set the parking brake and block the drive wheels.
- Run the engine only in a well-ventilated area because of carbon monoxide.
- Connect or disconnect the tool with the ignition off.
- Never drive while you operate the tool.
- Keep the battery fully charged and the OBD2 connection clean and secure.
Long routines such as an ABS bleed or a forced regen draw down the battery. A smart charger in maintenance mode holds voltage steady. Also, an extension cable lets you sit in the driver’s seat during the routine. The NOCO GENIUS5 and a 5-foot iKKEGOL cable handle both jobs. Our lithium jump starter guide covers charging options for dual-battery rigs.
Keep Power Steady During Long Scan Tool Routines
iKKEGOL 5ft 150cm 1.5M OBD-II OBD2 16 Pin Auto Car Male to Female E…
Safety note: Active tests switch on parts such as the fuel pump, cooling fans or ABS pump. Keep hands, hair and tools clear of the engine bay and wheels. End the test before you touch a component.
Final Thoughts
My pick for most truck and SUV owners is the Innova 5610. On supported trucks, it covers ABS bleeding, diesel resets and relearns after new tires or a lift. Better yet, it never sends a renewal bill. On a truck you keep for years, free updates make the 5610 the best bidirectional scan tool to own.
The 5610 has limits. Its screen is small, and body module coverage trails the tablets. It also lacks AutoAuth for 2018 and newer Jeeps and Rams. If my Gladiator still sat in the driveway, I’d buy the Autel MK808S instead. Want a bigger screen with free updates? The TOPDON ArtiDiag900 Lite fits. Toyota owners chasing dealer-level depth should look at the XTOOL D8BT V3.0.
Whichever tool you pick, run the maker’s coverage checker first. Test each suspect part before you buy it. Then store the tool with your overland emergency kit. One code read at the trailhead helps you decide whether to keep driving.
Best Bidirectional Scan Tool FAQ
What Is a Bidirectional Scan Tool?
A bidirectional scan tool reads codes and live data. It also sends commands to parts such as the ABS pump or cooling fans to test them. A basic code reader only reads data.
Do I Need a Bidirectional Scan Tool for My Truck?
You need one if you do your own brake, diesel, tire or suspension work. Those jobs need a tool to command the truck’s modules. If you only read check engine codes, a basic OBD scanner covers it.
What Is the Best Bidirectional Scan Tool Without a Subscription?
The Innova 5610 carries no subscription and updates for free, which makes it our pick. TOPDON advertises free lifetime updates on its ArtiDiag900 Lite tablet.
Does a Bidirectional Scan Tool Bleed ABS Brakes?
Many do, on supported vehicles. The tool cycles the ABS pump and valves while you bleed the brakes. Innova notes the automated routine almost always runs together with a manual bleed.
Which Bidirectional OBD2 Scanner Works on a 2018 or Newer Jeep?
Pick a tool with FCA AutoAuth support, such as the Autel MK808S or XTOOL D8BT V3.0. Then register an AutoAuth account. Without the account, you read data but won’t clear codes.