obd1 codes on chevy

[chevyaz]

I have a 94 chevy truck 350 5.7 I saw Erics video and was wondering about the codes in a obd1. I have no check engine light on and truck is running fine. But could there be codes that im not getting?.I heard obd1 is kinda funny like that sometimes. Thanks

Topic

[college man]

there will be a connector you can jump the a and b terminals
and turn the key on with engine off.Eric just did a video on pulling
codes for obd1 everything will apply except for the blue connector.

[Drunk32]

Here this website will help you!

GM OBD/OBD2 Codes

You can build something like Eric did but I just used a paper clip when I have to pull OBD codes. Just unfold it then use the two ends . One goes in the A slot and one in the B slot. Eric has done the same thing using a wire he just added the connector.

[chevyaz]

Thanks for your reply and website. But if there is no check engine light there still could be codes waiting true or false?

[Drunk32]

Yes, I believe that the computer stores codes for 50 key cycles. When I did mine mine only came on when I was on the highway.
So just do paper clip trick and then you will be able to pull your codes that you have had in the last 50 key cycles.

[chevyaz]

Ok thanks alot will do. I plan on buying a code reader they are handy to have.I never new it was so easy to get codes until I saw the Video Eric made.Thanks Eric! Plus I would rather do it myself than have the parts guy do it.

[EricTheCarGuy]

Normally if there’s a code it will turn the light on even if it’s OBDI however OBDI doesn’t have strict guidelines like OBDII does so you may have say a lazy O2 sensor but it won’t set a code, what you might notice however is a drop in fuel economy. This is a site you might also find helpful.

http://www.theimportkiller.com/forums/index.php?topic=420.0

[chevyaz]

Put the jumper wire in and all I got was a code 12 3 times so no worries. I tried a paper clip 1st but didnt work so I got the wire and bingo. Thanks again forum.

[college man]

All is good.Thanks for the update.

[EricTheCarGuy]

Keep us posted on what you find out about those codes.

[chevyaz]

My bad Eric no codes came up all good. It is pretty cool that a wire does all that. Wish I would have learned that a long time ago. Thanks again.SD

[EricTheCarGuy]

Learning stuff is what auto repair is all about. Personally I still have much to learn but that’s kinda what I like about this field.

Keep us posted of things change and thanks for using the ETCG forum.

[Author]

Replies