How to Display Diagnostic Trouble Codes

**DMAG** · 05-04-2005, 07:16 PM

How to Display Diagnostic Trouble Codes
by Tommy T.

Get in the car, close the door. Perform the following steps fairly quickly (less than 3 seconds) :

Turn key to ON
then back to ACC
then to ON
then back to ACC
then to ON

If there are any stored codes, they will appear immediately, in place of the odometer. For instance an "INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH" error will set a code of P0113.

Once the codes have been displayed, you'll see "-----". If there are no trouble codes, the dashes will be the first item displayed.

After a few seconds, the display changes to "-dOnE-".

This is the same procedure used on most, if not all, late model DCX vehicles.

**SilverMagRT** · 05-04-2005, 11:50 PM

Here is a link to a list of OBD codes I found via Goooooooooooooogle. There were other sites this has alot of information about the OBD system.

http://www.obdii.com/codes.html

**BobFam** · 09-13-2005, 02:55 PM

Originally Posted by DMAG

How to Display Diagnostic Trouble Codes
by Tommy T.

Get in the car, close the door. Perform the following steps fairly quickly (less than 3 seconds) :

Turn key to ON
then back to ACC
then to ON
then back to ACC
then to ON

If there are any stored codes, they will appear immediately, in place of the odometer. For instance an "INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH" error will set a code of P0113.

Once the codes have been displayed, you'll see "-----". If there are no trouble codes, the dashes will be the first item displayed.

After a few seconds, the display changes to "-dOnE-".

This is the same procedure used on most, if not all, late model DCX vehicles.

Hi. I tried it on my 2006 300C and it does not work. Is there something I am missing? Thanks, regards, Bob.

**Tommy T.** · 09-13-2005, 05:26 PM

Others have had the same problem, it's all in the speed at which you cycle the key in the ignition (even 3 seconds may be too much).

Gotta do it pretty quickly. Hopefully this will help.

-- Tommy

**BobFam** · 09-13-2005, 09:07 PM

Thanks Tommy. Guess I'll try faster. Best regards, Bob.

**magnumdude** · 09-13-2005, 10:58 PM

tried it....no work, will go down and try again faster

**magnumdude** · 09-13-2005, 11:00 PM

did it fast and it worked....thanks....no codes

**BobFam** · 09-13-2005, 11:34 PM

Hi. Did you go all the way back to ACC each time? I have tried all ways and can't get it to work. I read somewher all you had to do was go to ON then slightly back until the LED's are off and back to On and repeat it stopping at ON. I am going to try again a lot faster both ways. Thanks, best regards, Bob.

**MattRobertson** · 09-22-2005, 05:10 PM

I don't have the EVIC as in the example and am happy to report it works for my car as well.

**Animal451** · 10-29-2005, 02:07 PM

Originally Posted by DMAG

I tried the Fuse 17 option and now I'm getting 0120 and 1120 codes. My question is the letter in front of the code. My car shows a "U" instead of the "P", what is the difference?

Also wanted to know if there is a way to clear the codes, I have read that the OBD II tools won't work (although I probably should try to use mine).

**Meister** · 10-29-2005, 02:30 PM

Originally Posted by Animal451

...Also wanted to know if there is a way to clear the codes...

Try pulling fuse 11 for 30 seconds or so.

**fnkychkn** · 10-29-2005, 03:58 PM

Originally Posted by Animal451

My car shows a "U" instead of the "P", what is the difference?

U = communication
P = powertrain

**Animal451** · 10-29-2005, 05:09 PM

Originally Posted by Meister

Try pulling fuse 11 for 30 seconds or so.

Thanks, that worked . . .

**351Freak** · 01-07-2006, 05:57 PM

Originally Posted by fnkychkn

U = communication
P = powertrain

copy/paste...

Anatomy of the DTC

A DTC is made up of 5 digits. The figure below demonstrates the composition of a DTC. With this information it is easier to trouble shoot a DTC without knowing the description of the code.