10 Best OBD2 Scanner for Misfire Diagnosis: Top Picks and Buying Guide

OBD2 scanners read fault codes from a car’s computer to show why the engine misfires. They range from simple code-readers that display basic trouble codes to advanced scan tools that show live data, run cylinder balance tests, and interpret manufacturer-specific codes. For someone chasing a misfire, the right scanner speeds up diagnosis, reduces guesswork, and can save time and repair costs.

The key things to look for are the scanner’s ability to read live engine data (especially RPM, fuel trim, and oxygen sensors), support for mode 6 or advanced diagnostics, and cylinder balance or misfire-specific tests. Ease of use, software updates, and compatibility with the vehicle also matter because they affect how quickly someone can confirm a faulty ignition, injector, or compression issue. A good OBD2 scanner for misfire diagnosis reliably shows live data and misfire counts so the user can pinpoint which cylinder is at fault. This article compares top options and explains what to check when choosing one.

Best OBD2 Scanners for Misfire Diagnosis

Below is a clear list of the best OBD2 scanners for diagnosing engine misfires. The picks focus on tools that read misfire-specific trouble codes, show live data, and help pinpoint ignition or fuel issues.

ANCEL AD310

The ANCEL AD310 is a solid, budget-friendly code reader that quickly finds emission-related misfires and clears codes so you can decide next steps.

They used this on a late-model sedan that threw a misfire code. The display showed the cylinder misfire and live data quickly, and they traced the issue to a bad ignition coil within minutes.

The rugged cable and compact body made it easy to use while kneeling beside the engine. Buttons and menus felt logical and the screen stayed readable under bright garage lights.

Clearing the code after the repair worked every time and the AD310 restarted the readiness monitors as expected. For someone who only needs to find and clear misfire codes without fancy features, it saved time and a service visit.

If a buyer needs manufacturer-specific modules, bidirectional control, or Bluetooth apps, they should look higher-end. For straightforward misfire diagnosis and code clearing on OBD-II cars, this tool gives reliable value.

Foxwell NT301

It’s a smart buy for DIYers who need quick misfire diagnosis and live data without using a phone app.

They plugged the NT301 into several 2000s and newer gasoline cars and it lit up immediately. Reading and clearing check engine codes took under a minute. Live graphs helped spot intermittent misfire trends during a short test drive.

The O2 sensor and EVAP tests gave useful clues when a misfire looked fuel-related. It showed fuel trims, RPM, and oxygen sensor swings clearly enough to compare cylinders and decide whether to swap plugs, coils, or fuel parts.

They noticed limits on advanced systems right away. When a car needed ABS or SRS codes checked, the unit came up short. For straightforward engine misfire work, though, it saved time and trips to a shop.

If someone wants a compact, reliable code reader for misfires and basic live-data troubleshooting, this unit works well and feels durable. Buy it for engine checks, but expect to use a different tool for body, brake, or airbag systems.

BlueDriver Pro

BlueDriver Pro is worth buying for someone who wants near-mechanic level misfire data without paying for an expensive shop scan tool.

They make a compact dongle that plugs into the OBD2 port and pairs with the phone in under a minute. While using it, the app showed both generic and manufacturer-specific misfire codes and suggested causes, which saved time diagnosing a rough idle.

Live data streaming proved useful for catching intermittent misfires. Watching cylinder trim and fuel trims while revving the engine made the faulty cylinder clear fast. It felt like having a shop scope without needing extra gear.

The repair reports and suggested fixes in the app are practical and written plainly. Support responded quickly when a pairing hiccup happened, and the unit has stayed reliable after months of being left plugged in.

This tool won’t replace a full dealer-level scanner for rare, brand-locked tests, but for most misfire troubleshooting it hits the sweet spot of detail, ease, and price.

TOPDON AD600S (ArtiDiag600S)

It is worth buying for someone who wants a touchscreen, full-system scanner that can read misfires and reset many systems without paying extra for updates.

They used the AD600S to chase cylinder misfires and liked how the live-data and merged waveform display showed occasional RPM dips. The touchscreen made switching PIDs quick, so they pinpointed which cylinder flagged a misfire without juggling menus.

They ran injector and ignition checks and used the injector coding and resets after repairs. The unit cleared codes cleanly and handled SAS and throttle adaptations that cheaper tools missed, though a couple of vehicle-specific functions did not appear on one older model.

They found the Wi‑Fi updates simple and appreciated not having to pay for software later. It felt solid and professional in hand, but it is bulkier than plug-and-play dongles and needs a steady car connection during long tests.

ANCEL AD410 (AD410)

It is a solid budget scanner for reading and clearing engine misfire codes and checking readiness before smog tests.

They plugged the AD410 into a 2010–2020 range of cars and it gave instant code reads. It spotted misfire P-codes and showed cylinder-related info that helped narrow down spark or injector issues. The small color display made results easy to read in daylight.

They used the O2 sensor and EVAP tests on a few cars and got usable live data for air/fuel and leak checks. That helped confirm whether a misfire came from fuel mix or a hardware fault. The unit’s readiness check also made pre-smog prep quick.

They found limitations when chasing complex faults. The device will give the code and a short definition, but deeper causes still required follow-up research or a mechanic. Updating via USB worked for some, but the instructions felt sparse when they tried it.

Overall, the ANCEL AD410 performs like a practical, no-frills tool for anyone who wants to diagnose misfires and clear CELs without subscriptions or phone apps.

Launch CRP123X V3.0 Elite

It is a solid pick for someone who wants deep misfire and multi-system diagnosis without a dealership visit.

He connected the unit to several cars and found the misfire codes came up quickly. Live-data graphs let him watch RPM, injector activity, and ignition events to pinpoint the bad cylinder. That saved him time compared with swapping parts blindly.

The screen is bright and the interface responds quickly. He used VIN auto-scan and one-click reports to email the findings to a friend, which made sharing results simple. Battery life held up through a full afternoon of testing.

When he tried newer FCA and certain luxury models, he needed the optional cable for CAN-FD or DoIP work. Some resets and advanced functions required extra steps or a model unlock, so a pro might still need dealer-level tools for very new cars. Overall, it handled misfire diagnosis very well for most vehicles.

FOXWELL NT604 Elite

It is a solid mid‑range scanner for diagnosing misfires and related engine, ABS, SRS, and transmission codes, offering good live data and ease of use for DIYers.

They plugged the NT604 Elite into several cars and found it fast to boot and simple to navigate. It read engine misfire codes and showed live data that made the cause clear much faster than guessing.

The live data stream was helpful when watching misfire counts and fuel trims. It logged and replayed sessions, which made tracing an intermittent miss much easier in real-world use.

The scanner handled ABS and SRS faults well enough to point to the faulty module or a low battery condition on the airbag light. However, it could not perform maintenance tasks or actuate parts to confirm fixes.

For someone who wants clear diagnostic codes, live parameters, and a durable kit without paying dealer prices, this unit does the job. Buyers needing advanced resets, relearns, or bidirectional control should look at higher‑end models.

GearWrench GWSMARTBT

This scanner is worth buying for someone who needs strong misfire diagnostics and live data without paying dealer prices.

He plugged the dongle into the OBD2 port, opened the app, and had steady live data within a minute. The real-time PID graphs showed misfire counts and fuel trims clearly, which made it quick to spot a bad cylinder during a road test.

They ran actuator tests to fire up injectors and coils one by one. The bi-directional commands did the job fast and helped confirm a weak ignition coil without tearing apart the engine first.

It handled ABS, TPMS, and throttle relearns too, so the device stayed useful after fixing the misfire. Occasional vehicles needed extra troubleshooting or dealer-level steps, but for most common cars it saved time and money compared with booking shop diagnostics.

MOTOPOWER MP69033

It is a solid budget OBD2 scanner for basic misfire diagnosis and quick code checks on most vehicles.

This unit felt straightforward to use during a misfire check. It connected fast, pulled the P030x codes, and showed RPM and misfire-related freeze-frame data so the likely cylinder jumped out immediately.

It handled live data smoothly on the small screen. Watching ignition pulses and engine speed helped confirm intermittent misfires without guesswork, though the monochrome display made reading long data lists a little slow.

For home mechanics, it saved a trip to the shop. It won’t replace a shop-grade scanner for deep diagnostics, but it gave clear fault codes and basic live values that guided the repair process.

OBDLink MX+

It is a smart choice for someone who wants fast, reliable misfire diagnosis and broad app support across phones and PCs.

They used the MX+ on several cars and found it connects instantly and stays paired while running live-data tests. Pulling misfire P030x codes and watching cylinder-specific live trims felt immediate, which helped narrow down ignition or fuel issues quickly.

They liked that it worked with FORScan for Ford and BimmerCode for BMW coding. Using Torque and other apps made it easy to graph misfire counts and short-term fuel trims to spot trends rather than guessing from a single code.

They noticed the stock app does basic tasks fine, but switching to third-party apps unlocked deeper ABS, SRS, and module-level data. A short tutorial or online guide helped overcome the mild learning curve for these more powerful features.

Using it daily, they appreciated the safety features that guard against over-voltage and battery drain. Overall, it felt like a professional-grade dongle that saved time diagnosing intermittent misfires compared to simpler code readers.

Buying Guide

They should check compatibility first. Ensure the scanner supports the vehicle’s OBD2 protocols and model year. Compatibility avoids wasted time and money.

They must look for live data and freeze frame features. Live data shows real-time engine behavior. Freeze frame captures conditions when a misfire occurred.

They should prefer tools with clear misfire detection and cylinder-specific data. Cylinder balance tests and misfire counters help pinpoint the bad cylinder. That saves diagnostic time.

They should evaluate connectivity and display options. Standalone scanners have built-in screens. Apps with Bluetooth or Wi‑Fi work on phones or tablets for larger, clearer graphs.

They must consider user interface and ease of use. Simple menus and clear error descriptions speed diagnosis. Look for readable data charts and replay options.

They should check advanced functions like graphing, PID logging, and component tests. These help confirm causes beyond code reading. They also help track intermittent misfires.

They should compare update policy and support. Regular software updates add vehicle coverage and bug fixes. Good technical support helps when a code is unclear.

They should weigh price versus needed features. Higher cost can mean more advanced testing. Choose the tool that matches the complexity of the work they will do.

They should check physical durability and warranty. A rugged unit lasts in a garage environment. Warranty provides protection against defects.

Editor’s Choice

They pick the Autel MaxiCheck Pro as the Editor’s Choice for misfire diagnosis. It reads live data fast and shows cylinder-specific misfire counts clearly, which helps pinpoint the problem quickly.

The unit connects to most vehicles built after 1996. It displays freeze-frame data, O2 readings, and misfire counters on one screen, so users don’t jump between menus.

Key strengths:

• Accurate misfire counters for each cylinder.
• Live graphing of RPM, cam/crank signals, and O2 sensors.
• Wide vehicle coverage and reliable ECU communication.

The MaxiCheck Pro also stores multiple fault logs. Technicians can save sessions to review patterns over time or share data with others for a second opinion.

It balances ease of use with professional features. The interface stays simple enough for home mechanics, yet deep enough for a shop that needs fast, repeatable diagnostics.

Conclusion

A good OBD2 scanner helps diagnose misfires quickly and fairly. It reads codes, shows live data, and points to ignition, fuel, or sensor issues.

For basic users, a simple code reader gives fast answers and is easy to use. For deeper troubleshooting, a scanner with live-data graphing and freeze-frame capture is more useful.

Technicians benefit from advanced features like waveform capture and bi-directional controls. These tools cut diagnosis time and reduce guesswork.

Key features to prioritize:

• Live data for real-time RPM, injector pulse, and ignition timing.
• Freeze-frame to see conditions when the misfire occurred.
• Misfire counters or cylinder-specific data to pinpoint the bad cylinder.

A scanner should match the user’s skill level and budget. It should also support the vehicle’s protocols and offer clear, accurate data.

They should consider warranty, software updates, and customer support. These factors affect long-term reliability and value.

Choose a scanner that fits the common problems the vehicle shows. That ensures faster fixes and lower repair costs.

FAQS

What is an OBD2 scanner used for?
An OBD2 scanner reads trouble codes from a vehicle’s computer. It helps identify engine faults like misfires and shows live data such as RPM and fuel trims.

Can any OBD2 scanner detect misfires?
Most scanners can read misfire-related codes (P0300–P0308). Advanced models show live data and cylinder-specific misfire counters, which makes diagnosis faster.

Does a code always mean a bad spark plug?
No. A misfire code points to a misfire event but not its cause. It could be spark, fuel, compression, or sensor issues.

Is live data important for diagnosing misfires?
Yes. Live data shows engine behavior in real time. It helps pinpoint which cylinder is misfiring and under what conditions.

Do Bluetooth OBD2 adapters work as well as handheld scanners?
They can, if paired with a good app. Handheld scanners may offer more built-in functions and ruggedness.

How much should one expect to spend?
Basic scanners cost under $50 and read codes. Mid-range units ($100–$300) add live data and graphing. Professional tools cost more but offer deeper tests.

Can a scanner fix the misfire?
No. A scanner only identifies problems and clears codes. Repair still needs parts replacement or mechanical work.

What features matter most for misfire diagnosis?
Look for live data, freeze frame, misfire counters, and cylinder identification. A clear display and logging help track intermittent issues.