Automotive Holiday Deals Up to 50% Off Select Books Shop Men's Athletic Shoes Learn more nav_sap_SWP_6M_fly_beacon Train egg_2015 All-New Amazon Fire TV Grocery Gifts for Her Amazon Gift Card Offer cm15 cm15 cm15 $30 Off Amazon Echo $30 Off Fire HD 6 Kindle Cyber Monday Deals Classics and Essentials in CDs & Vinyl Outdoors Gift Guide on Tikes
2015 Electronics Holiday Gift Guide
CarMD 2100 Vehicle Health... has been added to your Cart
+ $4.97 shipping
Used: Like New | Details
Sold by Needing Things
Condition: Used: Like New
Comment: Box opened never used. All there Disc, cable, unit and instructions. Why pay full price order mine.
Other Sellers on Amazon
Add to Cart
+ Free Shipping
Sold by: The Pep Boys - Manny, Moe, & Jack
Have one to sell? Sell on Amazon

CarMD 2100 Vehicle Health System and Diagnostic Code Reader for OBDII Vehicles

by CarMD
245 customer reviews
| 17 answered questions

List Price: $139.99
Price: $69.90 & FREE Shipping. Details
You Save: $70.09 (50%)
In Stock.
Ships from and sold by
Without Extension Cable
  • Find out why your car's check engine light is on, inspect used cars for hidden problems and more
  • Save time and money knowing needed repairs, parts and labor costs before calling a mechanic
  • Works on 1996 and up OBD2-equipped cars, trucks, minivans, SUVs and hybrids - foreign and domestic
  • Quick-check an unlimited number of vehicles with easy-to-read, patented LEDs; Run detailed reports for up to three (3) vehicles
  • Generate Vehicle Health Report from an Internet-enabled PC or Mac to see current and potential problems, recalls and more
See more product details
2 new from $69.90 1 used from $52.99

Featured at TwitchCon 2015
$69.90 & FREE Shipping. Details In Stock. Ships from and sold by

Frequently Bought Together

  • CarMD 2100 Vehicle Health System and Diagnostic Code Reader for OBDII Vehicles
  • +
  • Docooler Obd-ii Obd2 16pin Male to Female Extension Cable Diagnostic Extender 150cm (5ft)
Total price: $82.89
Buy the selected items together

Product Information

Style Name: Without Extension Cable
Technical Details
Item Weight1 pounds
Product Dimensions8.2 x 3.2 x 6 inches
Item model number2100
Batteries:2 AAA batteries required. (included)
Manufacturer Part Number2100
Additional Information
Best Sellers Rank #10,672 in Automotive (See top 100)
Shipping Weight15.2 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First AvailableFebruary 25, 2010
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Product Description

Style: Without Extension Cable

Product Description

This product offers peace of mind for anyone who has ever worried about car maintenance and repairs. The easy-to-use device, which fits inside a purse or glove compartment, empowers drivers to monitor their vehicles health. The CarMD tool can be used to quick-check an unlimited number of vehicles. Within seconds, its color-coded (green, yellow, red) vehicle health monitor LED's tell you if your vehicle has any hidden problems, which is beneficial when inspecting a used car, preparing for a road trip or to find out if you will pass your emissions test. Plug the tool into your Mac or PC using the included USB cable and software plus your own internet connection, to generate a detailed report with most likely fix and estimated repair costs. By knowing which parts are needed and the labor costs, you can decide whether to tackle repairs yourself or better speak your mechanics language.

From the Manufacturer

In easy-to-understand English, see what's causing your check engine light to come on, get repair details, and see how much it costs to get it fixed. It's easy and fast, anyone using CarMD can go from their car to their report in minutes.

Powerful Technology Made Easy

Made for Anyone to Use
It takes only easy 3 steps to from your car to your report
In 3 simple steps, get the health of your vehicle without knowing anything about cars.
Plugs in easily from the comfort of your front seat.
Image of corner of report

Your Vehicle Health Answers, All in One Place

Complete Solutions for Check Engine Lights

The CarMD database saves you the hassle of looking up codes and basing repair decisions on questionable sources. Our solutions come straight from working mechanics specializing in your vehicle and double checked by Master Technicians. It's like having thousands mechanics look at your vehicle and agreeing how it should be fixed.

Accurate Repair Estimation

CarMD's report accurately itemizes the expected cost of your repair. So you know how much you should be paying for each part as well as the labor. Know what repairs should cost and protect yourself from being overcharged.

Instant vehicle health check

CarMD can quickly tell you if it is safe to drive. With CarMD:

  • You avoid riding in unsafe vehicles
  • Make sure your vehicle is road trip worthy
  • You are protected from buying a lemon while shopping for used cars
  • You keep your family and other drivers safe on the road


What cars does CarMD work with?

All vehicles (including light trucks, SUVs, minivans and hybrids) made 1996 or later.

Can I use it with my PC/Mac?

Yes both, CarMD works with both PCs and Macs.

How is CarMD better than:
  • Code Readers
  • Free Code Checks at Auto Parts Stores
  • Phone OBD2 Apps

CarMD is often compared with code readers and OBD2 apps. While it is true CarMD and all those tools read data from the OBD2 port, the similarities stop there. CarMD specializes in providing consumers a complete vehicle health solution in an easy-to-understand way. Not only has this never been done before, there is no other product on the market that does the same thing.

CarMD goes beyond simply defining trouble codes by using vehicle type, freeze frame engine data, and mileage to statistically determine the solution. When CarMD presents the fix, its database is sifting through more than a half-million real-life fixes made by thousands of skilled Automotive Service Excellence(ASE)-certified technicians who work on cars just like yours every day. Each fix is checked (peer reviewed) by ASE-certified Master Technicians and internally reviewed by our own ASE-certified Technicians to make sure it is the best possible solution. Our database frequently updates to ensure our customers receive the most up to date accurate fix for their vehicle from the most knowledgeable experienced professionals in the nation.

The average code reader, free code check, or phone app doesn't do any of that. The chart below illustrates why CarMD has over 250,000 happy customers, and counting.

Features CarMD Vehicle Health System Free Scans & Cheaper Code Readers
Defines trouble codes
Reports are in plain English (not 'technical')
Solutions for check engine lights
Free certified mechanic support by phone*
Shows car repair details & costs
Reports likely causes for vehicle issues
Finds service bulletins(TSB) related to vehicle trouble codes
Provides vehicle safety recalls
Offers vehicle scheduled maintenance reminders
Brakes & Airbag coverage

*All CarMD mechanics are ASE Certified

Customer Reviews

Most Helpful Customer Reviews

476 of 496 people found the following review helpful By Tim Robertson VINE VOICE on May 11, 2010
Style Name: Without Extension Cable
The CarMD diagnostic tool is a "Do It Yourself" (and sadly, "As Seen on TV") device that connects to your vehicle's On Board Diagnostic Port (OBD2) and lets you understand what is going on under the hood. Unlike some devices that read and display data from the OBD2 connector real-time (like real time gauges), this device has one function, and one function only: To help you understand what, if anything, is wrong with your car using this device and your computer, and it supports Mac and PC alike.

The device is fairly easy to use, but I suggest reading the small instruction booklet before you start. I didn't (who reads instructions these days?), and I ended up entering some bogus info into the CarMD database for my car, which I could not remove.

To get started, one would think you should start by installing the software that comes with the unit. You would think, but this is not the case. Of course, not reading the instructions, as I said, I did what most people would do after opening the box, inserting the batteries, and playing with the hardware for a few minutes, I started by installing the software onto my Mac. I then created my account on the CarMD web site as it instructed, it then asked me to connect the device to "marry it" to my account, and BAM, the data already inside the device, which was NOT for my car, was immediately transferred to my account and counted as the first of the limited 6 monthly reports one is allowed. It was also telling me that my car had unusual problems, which the hybrid car I own could not have. Obviously, some test data was still in the device and got downloaded to my account.

OK, not knowing how this incorrect data might be used in reference to my car in the future (can CarFax see this?
Read more ›
24 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
192 of 197 people found the following review helpful By Cameron Matthieu on January 2, 2011
Style Name: Without Extension Cable
This device is nothing new, and is what mechanics know as an ODB2 diagnostic scanner. AutoZone/Checkers/O'Reily/Pep Boys/etc. often have these available to borrow for free to see what error code (check engine light) your vehicle is producing. There are varying models and makes of these scanners, and the more advanced ones can reset/remove the error codes from the car. This is a useful tool, and can save you money, but it is not the only tool you should have. Common sense should also be in everybody's toolbox as well. If your car is running rough, if you brakes squeal or become spongy (when you depress the pedal), or if you have a burned out bulb - all of these things will NOT register on this device, nor any other ODB2 scanner, but should be repaired. The scanner can also be very ambiguous about the problem, or completely misdiagnose the problem completely; but will generally point you in the direction of what needs to be repaired. The oxygen (O2) sensor is a good example of this, where it could be a bad sensor or a more severe/complicated issue.

This is what people need to understand; this product is designed to read the diagnostic codes of your car and tell you what the CAR THINKS it is. The device itself does NO ACTUAL DIAGNOSTIC work, only reading the code that the vehicle produces. The only real benefits of THIS device compared to other ODB2 scanners is the fact that it can print some fancy reports, break down what the diagnostic code means into layman terms, and give a basic cost analysis of what it would take to fix the problem assuming the diagnostic code properly reflects the issue; in a single package. You can find the diagnostic codes and what they mean, as well as parts prices via a quick search on Google/Bing/Yahoo/Alta Vista/Webcrawler/Ask Jeeves/Whatever.
Read more ›
7 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
179 of 194 people found the following review helpful By Robert A. Sacks on March 13, 2009
Style Name: Without Extension Cable
Works fine.. BUT.. The potentially best feature is the website and they have a number of limitations on how you can use it. I bought one and just read the codes and Google what they mean. I've found it useful, but I wouldn't buy this again. There are a number of other code readers out there and the big downside of CarMD (aside from the limitations on use of the web site) is that it cannot reset your codes. Shop around... you can do better.
13 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
83 of 88 people found the following review helpful By N. Myers on June 2, 2010
Style Name: Without Extension Cable
In the FAQ's on their website, CarMD tells you that when you figure out that the problem isn't serious, you need to buy another code reader that will also reset your car's "Malfunction Indicator Lamp". Cut out the middle man; buy the other code reader to begin with.

Yes, this unit does exactly what they promise, but, without being able to reset the MIL, why does anyone need it?
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
107 of 117 people found the following review helpful By Mainer on January 20, 2011
Style Name: Without Extension Cable
Bought CarMD last summer after reading about it in Reader's Digest. A few days after receiving it, my car's engine light came on so it gave me a good chance to use it. It was easy to use, I got the code, linked up to and was told that they didn't recognize the code. So I took the car to a mechanic that I trust and they fixed the issue. A month or so after that, my wife's car's engine light came on so I went through the whole procedure again, and again the code was not recognized by the website. I was a little ticked off this time so I emailed them, and the CarMD customer service is as bad as their product. Seems like they are building up their database of codes by having their users "tell them what's wrong". This product is a FAIL and I wish I read more reviews rather than just trusting what I read in Reader's Digest, so my bad for that.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse

Set up an Amazon Giveaway

Amazon Giveaway allows you to run promotional giveaways in order to create buzz, reward your audience, and attract new followers and customers. Learn more
CarMD 2100 Vehicle Health System and Diagnostic Code Reader for OBDII Vehicles
This item: CarMD 2100 Vehicle Health System and Diagnostic Code Reader for OBDII Vehicles
Price: $69.90
Ships from and sold by