What do I need to reset codes?

[NickTransmissions]

Title question remains mostly unanswered.

You simply need a scan tool capable of clearing the code...I would think most basic, low-buck scanners can clear an evap code since it's an emissions related DTC.

 

[Fless]

Title question remains mostly unanswered.

You didn't like @Padraig's post in #2?

Like @NickTransmissions noted, a cheap scanner will usually clear codes. Just need to read the details on what it will do.

 

[exp500]

OBD1- short the proper pins with paper clip, watch code 12 flash. It's in the service manual.

 

[Fless]

OBD1- short the proper pins with paper clip, watch code 12 flash. It's in the service manual.

Oh, yeah, the idiot here was thinking OBD2.

 

[Mean_Green]

Grabbed a Zurich ZR11s from HF with a $20 off coupon.


Charts say it will do what I want.

If anybody thinks it's junk let me know before I open it and cost myself a $20 restock fee.

 

[exp500]

Grabbed a Zurich ZR11s from HF with a $20 off coupon.


Charts say it will do what I want.

If anybody thinks it's junk let me know before I open it and cost myself a $20 restock fee.

That is an OBD2 Scanner. Wont work. See post13 above.
Download the service manual for free and it will save you headaches

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

 

[Eman85]

Let's recap, truck is setting evap codes, no evap codes with OBD I.

 

[strutaeng]

He must have a OBD2 Vortec truck?

"Clearing codes" is something I almost never do. All that does is causes you to drive it more until the drive cycle is complete again, only to see the code pop up on the dash again. Could be instant or could be 20 miles of driving.

Only exception is if I know the code was set because I was messing around with something and disconnected a sensor, or something like that.

Probably a service manual diagnostics table for that code will help, if someone has one?

 

[Mean_Green]

Works. Pulls up all sorts of data and records 'Live Data' while engine running. Also has an Enhanced Code mode for GM products which showed all sorts of MAP sensor and other codes (about 40) but I can't tell when they were set or if any work was done afterwards.

It allowed me to clear everything, so I'm back to no codes and no Service Engine light on the dash.

I'll try to record live data next time I drive and see what it shows over a longer run. I only did it for a few minutes in the garage, but it reacts to throttle with RPM which matches the Tach on the dash.

Initially it showed the same Evap code as noted above.


Connect to my Tablet using RepairSolutions2 which saves data and can be reviewed.

 

[Mean_Green]

Also does ABS codes which showed me 'Front Right Wheel Speed Sensor' errors and a couple of others. Might look into what it takes to deal with that.

Not really concerned about the Evap code since it doesn't affect operation and we don't have testing here.



As shown below, 8th digit is 'R' for 5.7 Vortec V8