Hello everybody,

I have 94 Deville with 4.9l engine. My SES ligght came on couple times. I checked the codes. They are P030, P052 and P098 do you have any comments about these codes I reset these codes and drove the car for some time and SES won't come back. Is it serious or should ignore it? Thank you for the replies....

Hello everybody,

I have 94 Deville with 4.9l engine. My SES ligght came on couple times. I checked the codes. They are P030, P052 and P098 do you have any comments about these codes I reset these codes and drove the car for some time and SES won't come back. Is it serious or should ignore it? Thank you for the replies....

Your Idle Speed Control motor ( ISC) may need replacement. Do you hear unusual noise coming from it when you shut the engine off? ISC reudjusts itself after shutting down the ngine and when it is bad the soft rattling noise becomes quite noticeable.

PO52 means you have had the battery out recently
p098 High RPM P/N to D/R Shift Under ISC
p030 ISC trouble

Perfectly normal to have the ISC motor go out , a replacemnt can be had at advance autoparts for around 55 bucks .....

these will beging to fail intermittently for awhile then will comepletly die ...your best bet is to go ahead and replace it , if it keeps getting stuck in high idle you not only end up powerbraking the car at lights but cause undue wear and tear on a tranny that isnt very hearty .....

Thank you for your answers guys..
I would like to ask you one more thing. Is it hard to change ISC motor. Original part is around $180 , but in adnace autoparts it is around $55 should I go with the cheap one , will it cause any troubles. If you let me know about it I wil lbe happy. By the way stoneage_caddy I live in Tampa USF area. Would you tell me the details about your meeting? I would like to attend... Thank you again

really you live her ein tampa too ???

look its easy to change that isc out , if you want i can walk you thrut he process at the meet go ahead and get the 55 dollar one , ive had that 55 dollar unit in my car for a long time with no problems at all

if you click the link i will paste below here the very first post is the information for the meet.......the link in that post is a map of where it will be , nothing has changed from that very first post

http://www.cadillacforums.com/forums/showthread.php?p=328423#post328423

i hope you can make it out to the meet , i will have my tools and service manual so if need be we might be able to do the swap right there if you would like ...

I got a used one with a 30 day warranty at Copher Bros. on Causeway Blvd.(22nd St).
It came from a 93 DeVille.
$8.50

hey alison dude you still live in the area ? you otta come out to the tampa meet