Top 10 OBD2 Scanners Review 2020

Looking for a suitable OBD2 Scanner for your vehicles? I have spent thousands of hours testing hundreds of scan tools and picked the top 10 ones for cars, pickups, SUVs, etc.

OBD2 Scanners

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Code Readers & Scan Tools

Discover updated reviews & buying guides of the best code readers & scan tools for cars, pick-ups, SUVs, heavy-duty trucks.

OBD2 Apps & Software

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Other Garage Tools

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OBD2 Codes

Get detailed guides to the symptoms, causes, diagnosis, and how to fix the codes

Repair & Maintenance Guides

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Free User Manuals

Download user manuals of code readers & scan tools, TPMS tools, battery testers, battery chargers, timing lights, thermometers, multimeters, power inverters, jump starters, etc.

P0031 Code: Meaning, Symptoms, Causes, And Fixes

The P0031 happens when the resistance of the heater circuit in bank 1 is too low to heat fuel until it achieves air to fuel ratio of 14:7. The problem is coming from the 1st sensor of bank 1. This code is usually triggered when resistance level is below 0.8A.

P0021 Code: Meaning, Symptoms, Causes, And Fixes

The P0021 trouble code means that when the camshaft timing for bank 2 is above and beyond the limit set by the ECM. This causes an over-advanced condition that occurs either during retarding or advancing of the camshaft timing.

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