Code Reader

[sophiesmom64]

I'd like some input about purchasing a code reader. I'm having trouble with my Escape and I have a feeling it will be turning into a nightmare soon, like in a few hours!

How do code readers work and are they reliable? I didn't know you could purchase and use them for personal use and have no idea what they are all about.

Thanks!

[Davescort97]

Welcome to AF! Code readers detect a fault in the OBDll (Onboard Diagnostics) system of your vehicle. This is called a DTC (Diagnostic trouble code). The DTC is stored in the computer's memory until a scanner is hooked up that can read the code. The code might not tell you which component has failed or why, but it will tell you which emission control system or sensor circuit the fault is in.


When a basic code reader is plugged into your vehicle's diagnostic connector it will display any diagnoistic trouble codes that are found. The least expensive code readers just give you a number while the better ones give you a definition of the code, too. Any Haynes manual availabale at most parts houses will list the numbers of the trouble codes and tell you which system is at fault. Code readers are very reliable. They don't give false trouble codes.

The most advanced code readers give you real time diagnostic data with a readout of what the code means. These usually cost about $150-$300. A simple code reader that will just give you the DTC number runs about $30-$50, then you will need a manual such as Haynes to tell you what the trouble code is.

If you live near an Auto Zone parts house, they will read the trouble codes on your vehicle that are making the Check Engine Light (CEL) come on. They do this as a free service. Just go in and ask them to pull the codes on your car. So, check them out. They will be able to tell you what the code is and will be able to tell you which circuit or sensor needs to be fixed to erase the code. Dave

[Tuffdrvr88]

You can also by a pocket code reader from your local auto parts store. You just plug it into the diagnostic link (almost always under the driver side dash, looks like a computer hook up) and turn the key forward. Press the read button and wait for it to give you a number. Number will look like p0012. The book that comes with the reader will have the numbers and descriptions of the problem. Find the problem and fix it. If your lucky it may just be the code. If not...it may be something is wrong that is causing the sensor to read faulty while not being bad. Its all part of the game. Good luck.