1983 Cadillac Deville light service soon, service now

ROSSO987

MEMBER
1983 CADILLAC DEVILLE
4.1L
V8
RWD
AUTOMATIC
86,800 MILES

Hello everyone from Buenos Aires Argentina, I have pride in being the owner of this wonderful car, but in the instrument panel lights are lit service now service soon. I have no owner's manual but I have put on the computer self-test mode. And got these codes -1.8.8, 30, 52 1.8.8, 30, 52 1.8.8, .7.0.
I need help translating these codes and know which is the problem in my car I have searched the internet but have not been successful, would be very grateful if you could help me with this problem.

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

The codes should be 2 digit numbers. Are you sure that you are reading them correctly?

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Sunday, September 21st, 2014 AT 8:05 PM

ROSSO987

MEMBER
5 POSTS

IYes, on the computer appear in this order:
First: -1.8.8
Second: 30
Third: 52
Fourth: 1.8.8
Fifth: 30
Sixth: 52
Seventh: 1.8.8
Eighth:.7.0
in that order numbers appear

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Monday, September 22nd, 2014 AT 11:34 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Code 30 - ISC RPM out of range

Code 52 - PCM Memory Reset

1.8.8 indicates the start of diagnostics

7.0 indicates the end of the diagnostics

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+1

Monday, September 22nd, 2014 AT 5:26 PM

ROSSO987

MEMBER
5 POSTS

I understand, and I can solve these two Codes?
The memory must be reset?, As the reset?
These two error codes mean a serious problem in car?
Thanks for the help

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Tuesday, September 23rd, 2014 AT 11:04 AM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

I don't feel they are too serious. If the battery has been disconnected, it could set the one memory code. The idle speed control (ISC) solenoid may be bad with the other code.