Hey, my 1989 cadillac seville has te codes: b120, b121, b122, b441, b552. What do these mean?

go google and type in --- fault codes for 1993 cadillac seville--
the first site is cadillac OBD codes -- and if you click on that site you will find a page cadillac pages
page 2 in the middle column there is a section cadillac seville 1993-1995 4.6 L at the bottom of that column
click on it and the fault codes appear
if you right click on the screen , a print section should appear and you can take a snapshot of the screen and any screen page after that so that you can get a hard copy of the fault codes

TYPE: OBD 1 Code 13 etc & read for hours

Could Type: 1989 Cadillac OBD 1 Codes

It's all there on the internet

Codes,Problems & Solutions--- dozens-- if not
hundreds of sites,forums,tech info,etc

just have a look you will be able to see them easy enough they will be part of the shock absorber at the top behind front wheel

B119 is a twilight photocell circuit code. B121 is the twilight enable switch E018 is open crank signal circuit.

I have seen the cars in a pullapart salvage yard, I have a 89 seville. 88,89,90,91 part will interchange on some models.

Replace the brake hose. It has collapsed on the inside and the outer casing is holding pressure on the caliper.

Very simple .. You just need a proper tool to plug out the spark plug.. i Work in a garge.. if want u r near to richmond, london.. mail me @ buvan008gmial.com

Check the vacuum hoses that connect to the cruise servo for leaks.

If no spark you might try a dist. module

Its under the battery, you can see it from underneath car. What is wrong with car? I have a service manual.