QuestionQUESTION: I've got a Cadillac Seville STS, 1993. The Service Engine Soon light went on. After the service the light didn't went out again. What do I have to do? Should it go out automatically or are there any buttons to push?
ANSWER: To check for CODES:
1. Ignition ON. Engine OFF.
2. Simultaneously push and hold the off and warmer buttons for 3 seconds and release them.
3. After all the codes display you will see ECM? or PCM?
4. The codes will display as LETTER/NUMBER display with CURRENT or HISTORY with each code displayed.
5. I need to know the exact information that you see on the fuel data panel as if you were video taping it.
6. turn ignition off.
---------- FOLLOW-UP ----------
QUESTION: The Codes are as follows:
P085 Current
No IPC Codes
A047 Current
A048 HIstory
No SIR Codes
NO TCS Codes
NO RTD Codes
PCM?
A few days ago, I got the massage Very low refrigerant A/C Compressor off - 12
I took the car to the mechanic to refill the A/C System with the R134.
When he finished with filling about 2,2 lbs of R134 into the system, the code remained the same! What's wrong with the A/C System?
AnswerYou need to ERASE (delete) the codes from the computer.
1. Re-enter diagnostics and when you see PCM?
2. Continue to push and release the LO button until you see ACP?
3. Push and release the HI button and you will see ACP DATA
4. Continue to push and release the LO button until you see ACP CLEAR CODES?
5. Push and release the HI button and you will see ACP CODES CLEAR. Wait 3 seconds before turning OFF the ignition.
6. This will clear all the "A" codes.
