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64coupe 68coupe 82 limo
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Discussion Starter #1
Car has done 75000 klm Messages coming up on dash " service suspension" service idle control" "speed limited to 145000 klm" "change engine oil"
Car is driving fine, have changed oil? How to get these messages to go away, or is there service req, and if so what?
Cheers Brian Brisbane Australia
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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20,096 Posts
Car has done 75000 klm Messages coming up on dash " service suspension" service idle control" "speed limited to 145000 klm" "change engine oil"
Car is driving fine, have changed oil? How to get these messages to go away, or is there service req, and if so what?
Cheers Brian Brisbane Australia
=========================
Car is driving fine,
maybe -

have changed oil?
either the OLM - Oil Life Monitor - was not reset at the last oil change -
OR you are again due for an oil change -
OR the engine was overheated thus triggering the change oil message -

How to get these messages to go away
FIX the problems triggering the warning messages -

is there service req,
YES - of course

and if so what?
THAT'S the million dollar question -
STEP #1 - ALWAYS - check for DTC's - Diagnostic Trouble Codes - using the on-board scanner -
if you don't know how - go here -

post any codes you have -
ALONG WITH THEIR DEFINITIONS -

include whether they are C-Current or H-History -

for code definitions - go here -


here is a how-to video -

------------------------

I suspect you'll get codes pointing to failed struts and/or shocks -
these probably caused the service suspension and speed limited messages -

the codes will tell us what we need to know -
 

·
Registered
64coupe 68coupe 82 limo
Joined
·
3 Posts
Discussion Starter #3
=========================
Car is driving fine,
maybe -

have changed oil?
either the OLM - Oil Life Monitor - was not reset at the last oil change -
OR you are again due for an oil change -
OR the engine was overheated thus triggering the change oil message -

How to get these messages to go away
FIX the problems triggering the warning messages -

is there service req,
YES - of course

and if so what?
THAT'S the million dollar question -
STEP #1 - ALWAYS - check for DTC's - Diagnostic Trouble Codes - using the on-board scanner -
if you don't know how - go here -

post any codes you have -
ALONG WITH THEIR DEFINITIONS -

include whether they are C-Current or H-History -

for code definitions - go here -


here is a how-to video -

------------------------

I suspect you'll get codes pointing to failed struts and/or shocks -
these probably caused the service suspension and speed limited messages -

the codes will tell us what we need to know -
THERE ARE NO CODES ?Have scanner
 

·
Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
·
20,096 Posts
THERE ARE NO CODES ?Have scanner
=================
with THOSE messages - there ARE going to be codes -

use the ON-BOARD scanner and check for codes -
 
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