Service Engine Soon Light
Le Mans Master
Joined: Oct 2004
Posts: 7,706
Likes: 485
From: Everett WA
C4 of Year Finalist (appearance mods) 2019
The best thing for you to do is to read the codes that the system will be putting out. this gives you the best diagnostic starting point. If you do not know how to use a paper clip to read the codes you can google it. Here is a basic set of instructions:
http://www.neilkline.com/Tech%20Tips/obdcodes.htm
http://www.neilkline.com/Tech%20Tips/obdcodes.htm
Thread Starter
8th Gear
Joined: Nov 2018
Posts: 8
Likes: 0
From what I'm reading in past posts the common most cause for service engine soon is a mobile 1 oil change (which I've done already) and a code to replace both O2 sensors. Both of mine are original 1995 oem. Your thoughts?
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Find out what code or codes are causing the check engine light. This is the first step.
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Drifting
Joined: Nov 2015
Posts: 1,333
Likes: 397
From: Clay New York
If you are unsure how to do it I believe Autozone and some other parts stores, will do it for you.
P.S. my 95 S10 was obd 2 so I'm not sure why you're being told to use the obd 1 method to read the codes ?
P.S. my 95 S10 was obd 2 so I'm not sure why you're being told to use the obd 1 method to read the codes ?
Racer
Joined: May 2018
Posts: 350
Likes: 74
96 was the first year for obd2 in the Vette, and the only year for a C4. 94 and 95 have what looks like an obd2 interface but it’s still an obd1 computer behind it.
Thread Starter
8th Gear
Joined: Nov 2018
Posts: 8
Likes: 0
Hi all so i took my1995 C4 to my local automotive tech shop.
They did the diognostics code scan check and it read code 48 (mass air sensor failure)
I'm having the work done and sensor replaced and are clearing the code. Hopefully that Service Engine Soon light will disappear.
They did the diognostics code scan check and it read code 48 (mass air sensor failure)
I'm having the work done and sensor replaced and are clearing the code. Hopefully that Service Engine Soon light will disappear.
Last edited by Frio; Nov 14, 2018 at 12:40 PM.
