When your Caddy has problems,
WE NEED THE CODES.
PLEASE PULL THE CODES !

GM uses OBD-1, OBD-II, OBD-III Codes

Ohh, you dont know how to do it?
Here are a couple of help threads:

this 1st one is very detailed ..
http://www.cadillacforum.com/m_11904/tm.htm

these have additional info and links
http://www.cadillacforum.com/m_12932/tm.htm
http://www.cadillacforum.com/m_15478/tm.htm
hhttp://www.cadillacforum.com/m_17425/tm.htm

how do i go about resetting my obd systems I had some old codes and trying to make sure the ones i have at the momment is new and needto know how to fix them . PO171 & PO174 both are too lean codes, PO300 ramdon misfire but it not, PO603 memory error,P1632 THEFT SYETEM FUEL, AND last is the TCC PO741stuck off

forget to tell you the year is 1996 deville

Disconnect the battery for a few minutes.

or try this

PRESS:
OFF & WARM (red button) together
- the D.I.C. will light up the instrument cluster like a Christmas tree
- the D.I.C. will start diagnostics, as soon as it starts displaying ..

PRESS:
LO
- until " ECM " comes up

PRESS:
HI
- until " CLEAR CODES ? " comes up

PRESS:
HI
- press only once
- response will be in a few seconds: CODES CLEARED

you are done ...

PRESS RESET and you are back to normal

Do older Cadillacs (1968's) have codes?

do you clear the codes on a 95 sls the same way?

Do older Cadillacs (1968's) have codes?

no ...


do you clear the codes on a 95 sls the same way?

yes ...


.

thank you.:D

i tried to clear my codes i never found the ecm to clear it now what do i need to do?
thank you

After all the codes are displayed, DIC should display "PCM". Press high blower button and you will be in the ECM/PCM module options. Press low for no and high for yes for what comes up. on 82-95 Cadillac powered models scanner is not required, diagnostics intended for use with "on-board diagnostics". 80-81 DFI or 8-6-4 are unique to themselves, still have "on board" but access and data are different. Cimmaron and 86-96 RWD Fleetwood or Brougham require scanners. EFI - no onboard, no scanner, nor codes "Symptom Charts"...FSM,DVOM, and a prayer or two.

thank you i thought so.

but if i may be so bold to ask,these cars have more problems than any auto i have ran across,im an auto electrion by trade,an these cars have always puzzeled me,i wish they would make a scaner just for cadys like this,but i still lv my sls,its so cool to drive.i will overcome this car,i just think if i own it i should an will cure it.thanks for all yr help.
jon.

i found something out about the cady codes today,the computer system in these cars are tied togather,now what i mean is if it puts out one code it will throw out many codes for many other thing that throws you off,and can be as little as couple of pin in the pcm plug.I will share more info as i get it.

In regards to the scanner; it is built in to the car, you just need to know how to use it.

This STICKY would be great if it actually had a link to a list of the codes.