CanOBD2® Diagnostic Tool B/W Screen™ Part#3020b

The INNOVA 3020 is a great entry-level tool for diagnosing Check Engine problems, checking road trip readiness, inspecting used cars and more (no automotive experience needed!)

  • Works with any car, light truck, minivan, SUV or hybrid manufactured since 1996 (OBD2) – foreign and domestic.
  • Black and white screen shows each diagnostic trouble code.
  • Connects to the OBD2 port (usually found under the steering column).
  • RED-YELLOW-GREEN LEDs indicate emissions test readiness and alert of pending problems (great for a quick road readiness test or used car inspection).
  • Read and Erase CHECK ENGINE light codes with a click of a button.
  • Diagnose and erase ABS (anti-lock brake) codes on most popular, newer-model vehicles (GM, Ford, Chrysler, Toyota, and Honda).
  • Freeze frame shows engine conditions such as fuel trim, engine coolant temp, etc., at the time the Malfunction Indicator Lamp (MIL) was set.
  • Support available Monday – Saturday (6 a.m. – 6 p.m. Pacific time) in English or Spanish, from Innova’s California-based team of Automotive Service Excellence (ASE)-certified technicians.
MSRP $35.30

CanOBD2® Diagnostic Tool B/W Screen™ Part#3020b

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Tool Reviews

Can I retrieve manufacturer-specific Diagnostics Trouble Codes (DTCs) with this Code Reader?

Yes. The 3020b Code Reader is capable of retrieving manufacturer specific codes. The tool will retrieve both Generic (P0, P2, P3, and U0) and Manufacturer Specific (P1, P3, and U1) OBD-II DTCs.

Why doesn’t the Code Reader power up on my vehicle?

This condition indicates that power is not being supplied to the #16 pin of the vehicle’s Data Link Connector (DLC), and is usually caused by a blown fuse. You should check the condition of all fuses, but the defective fuse will most often be associated with a system that has power at all times, such as the cigarette lighter, horn or dome lights.

I lost my Owner’s Manual, where can I get another one?

You can download a copy of the Owner’s Manual  in Adobe PDF format and download the software from Innova website ( Click on the "Support" Tab, and choose "Manuals and Software". 

Why does the “error” message display?

The “error” message indicates that the Code Reader was not able to establish a link with the vehicle’s computer. Check the cable connections at the vehicle’s Data Link Connector (DLC) and at the Code Reader. Turn the ignition off, wait 10 ~ 12 seconds, then turn the ignition back on to reset the vehicle’s computer.
NOTE: If you continue to receive the “error” message, try starting the vehicle first, then connect the Code Reader to the vehicle’s DLC with the engine running. If the condition continues, it may be necessary to update the Code Reader firmware. If you are still unable to link to your vehicle after performing these steps, please contact our technical support team for additional assistance.

Where can I get code definitions for the codes I retrieved if definitions are not available through the Code Reader?

Definitions for all available DTCs (both Generic and Manufacturer-specific) can be accessed through the Innova website ( Go to the "Support" tab, choose DTC Library, and follow the on-screen instructions. Please enter P0 (zero), not Po when entering the codes. 

Will this code reader display live data and do bi-directional functions?

No. it won't  stream Live Data and it doesn’t have bi-directional functions. Please refer to Innova’s Scan Tools for Live Data capabilities. 

Can I use the Code Reader with the engine running?

We always recommend connecting the Code Reader to your vehicle first, before turning on the ignition or starting the vehicle. So long as this procedure is followed, you can use the Code Reader on the vehicle while it is running.
IMPORTANT: If it is necessary to drive the vehicle while observing the Code Reader's display (such as when performing a Drive Cycle), ALWAYS have a second person help you. One person should drive while the second person observes the Code Reader's display.

Will this Code Reader display a vehicle’s VIN?

No. The Code Reader incorporates the capability to retrieve “Vehicle Information” (the VIN and controller ID numbers) to determine the version of programming in the vehicle’s computer. However, it will not display the VIN on the screen. *Not all vehicles will support this function.

Will the Code Reader damage my vehicle’s electronic systems?

Innova’s Code Readers and Scan Tools are designed to retrieve information that is stored in your vehicle’s computer. With the exception of initiating the EVAP system Leak Test, O2 Test, and Non-Continuous Test (for vehicles that support these tests), the tools do not command, control, or otherwise enter information to your vehicle. It is not possible for these tools to damage your vehicle’s electronic system.

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FEATURES 3020 3030 3040 3100 3120 3130 3140 3150 3160
CEL - Diagnose + Clear - 1996 + Diesel + Hybrid
ABS - Diagnose + Clear
Vehicle Health - Confirms State Emissions Test
Emissions Readiness Advisor
Definitions in English | Spanish | French  
Internet Updatable & Upgradable  
Battery Backup      
AirBag - Expanded Asian & European Coverage              
View Live Data          
OBD1         Optional Optional Optional

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