Saving yourself a trip to the mechanic is likely less expensive than you'd think. With Kobra's OBD2 Scanner & Wi-Fi Car Code Reader, you can plug it into pretty much any car made after 1996 to get more information about why the Check Engine light might be on and other codes showing on your dashboard. Though it's normally sold for around $20 at Amazon, Woot has this OBD2 scanner on sale for only $12.89 right now. That's more than $7 off its regular cost.

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Kobra OBD2 Scanner & WI-FI Car Code Reader

This car code reader connects to a free app on your phone and sends readings over Wi-Fi. Plug it into your car to figure out why the Check Engine light has been on, clear error codes, and more.

$12.89 $19.99 $7 off

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The Kobra car code reader can connect to and read the code from any car made after 1996, then it uses Wi-Fi to transmit the readings to its free app, or third-party apps like Torque Pro on Android or DashCommand on iOS. It can retrieve both generic codes and car manufacturer specific Diagnostic Trouble Codes, and it'll also clear that Check Engine light that's been pestering you for months. More than 2,000 reviewers give this reader 3.6 stars out of 5.

There's also a version on sale for the same price which doesn't have app compatibility and shows readings on a tiny screen instead, which could be a better option for anyone who doesn't rely on their phone being around 24/7.

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