Service Engine soon light (Page 1/1)
Fatfarmer OCT 13, 10:59 AM
Hello

I have a 1987 SE 5-speed V6

On my way home today I noticed the service engine soon light come on

Just yesterday I had changed my engine oil at the distance of 5,000km

I dont have an owners manual and google doesn't seem to understand what I'm asking it so I was wondering if this light is a reminder to change your oil or if it was warning me of somthing about to fail like a check engine light

Only had my car for about 2 months and this is the second oil change it's gotten, 1 when I bought it and 1 yesterday.

If it is just reminding me to do an oil change how to I get it to turn off?

Thanks
fierosound OCT 13, 11:11 AM
Welcome aboard!

It is NOT an oil change reminder. Is it still on?

You should check the ALDL codes and get back to us.
http://calgaryfieros.com/OSGdocs/codes.html
https://www.fiero.nl/cgi-bin/main.cgi?ECMCodes



PDF Owner's and Service Manuals and more
https://fieroinfo.com/

------------------
My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 10-13-2023).]

Fatfarmer OCT 13, 01:10 PM
Yes it's still on. Stays on solid after starting the car. I will follow your instructions and get back to you with the code

Thanks

[This message has been edited by Fatfarmer (edited 10-13-2023).]

Fatfarmer OCT 13, 06:25 PM
Ok so I checked the code and it was a 21 gonna read a bit more about it and then try and fix

Thanks
Patrick OCT 13, 07:35 PM

There are several ways (all documented here) to check the continuity of the windings in the TPS. If the TPS itself checks out, then the harness and/or connector could be suspect.
fierosound OCT 14, 09:59 AM

quote
Originally posted by Fatfarmer:

Ok so I checked the code and it was a 21 gonna read a bit more about it and then try and fix




If you downloaded the PDF of the 87 Service Manual, TPS diagnostics are on pages 6E3-A-32 to 35.
All you need is a digital voltmeter.

To clear codes from the ECM disconnect power to the computer.
You can pull TOP LEFT fuse, or disconnect/reconnect power connector near the battery.