CAlley2001

My SES light came on today. The only thing I have done recently is HPPIII programming about a week ago. I changed the shift firmness, shift points, and rev limiter. Could any of this throw a code? Anybody else had HPPIII cause a SES light?

blackhawk2000

What code is it?

227Hawk

iTrader: (1)

Programing itself shouldn't throw
code Either read code or how about
the infamous fuel code.Had quite a
few of those tilli got in the habit
of really spinning gas cap <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

CAlley2001

I don't know the code. I don't have A-tap. What is a read code? And you can actually get a SES light if you don't tighten your gas cap enough? *laugh I doubht thats it, its been a while since I filled up.

227Hawk

iTrader: (1)

GM in thier infinite wisdom,yes it will
set off a SES light. <img src="gr_grin.gif" border="0">
And i have been running HPP in a 2001
no problem from Changing paramiters
around <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

CAlley2001

Hmm...Could it just be a meaningless code or glitch that will correct itself and shut off?

227Hawk

iTrader: (1)

IF it's fuel related alot of times
they clear.You can always reset ECM
Pulla search it'll show reset <img src="gr_grin.gif" border="0">

zombiedude

iTrader: (1)

A evap test wont run untill fuel level is between 85% to 15%. That's why the light doesn't come on right after fill up. SNEAKY! At least 3 CLICKS on the cap is what they say. I say make it click for a 1/4 turn. Bunch of clicks. <img src="gr_images/icons/wink.gif" border="0">

227Hawk

iTrader: (1)

Thanks Zombiedude I think he thought to
much <img src="graemlins/gr_chug.gif" border="0" alt="[chug]" /> And i was BSing him That doesn't
sound bad <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

CAlley2001

Shouldn't the light go off when you tighten the cap though?

Toxic Texan

You can go to www.actron.com it can read codes and clear them. Most parts houses have them I got mine at autozone.

[ February 15, 2002: Message edited by: Toxic Texan ]</p>

zombiedude

iTrader: (1)

Must have a scan tool or the like to clear codes in an OBD2 vehicle. Disconnecting the bat will do it BUT you may have to wait 2 days. Not like the days pre-OBD cars. disconnect the bat pre '95 Chevys would take 10 sec to clear. After '95 OBD 1 and 2 cars will do it in 30 min. others will take a lot longer. ie a weekend. I don't know how long These car take. Hope this helps. Haven't been to a school on these car yet. But 1 is coming and I will go. <img src="gr_images/icons/wink.gif" border="0"> Just at this site
www.installuniversity.com ! They also have a way to clear codes. EASY! <img src="graemlins/gr_hail.gif" border="0" alt="[hail]" />

[ February 16, 2002: Message edited by: zombiedude ]</p>

CAlley2001

Well I got it A-tapped and I got a PO420. catylst low efficanty bat 1 or something. Really strange since my car only has 7k miles. I can't believe the 02 sims would be out or the cats clogged. So I reset it and hanv't got the SES back on yet. So *fingers crossed*.

227Hawk

iTrader: (1)

Been running octane boost? Or alot of wot
runs? Think you're ok just curious <img src="gr_stretch.gif" border="0">

CAlley2001

Guilty on the ladder question. I just got my HPP3 programming, so I'd been testing it out. Quite a few WOT runs.

227Hawk

iTrader: (1)

Ok ,i've got 2001 also when i first
programed HPP guess what <img src="gr_grin.gif" border="0">
Yeah poped the code, don't know why
either. Although i do remember car
smelled rich when i shut it down.
Guess would be to much WOT without
letting car run long enough to burn
cats clean
<img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

CAlley2001

Well, thats good for me to hear it happend to somebody else. Guess nothing to worry about then. Thx for your help guys.

227Hawk

iTrader: (1)

You have mail, Hope it helps <img src="gr_stretch.gif" border="0">

CAlley2001

Damit. My SES light came on again after I cleared it just 2 days ago. Could I have a bad 02 sensor or clogged cat? My car only has 7k miles on it. Or is this HPPIII programming to blame? How do I correct this annoiance?