Code 51: PROM Failure - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jim85IROC · 02-14-2006, 09:10 AM

Not what I expected when I came out to the truck this morning. I started the truck and went back inside, and when I came back, the SES light was flashing at a very quick rate, which is something I've never seen a GM light do before. Of course the batteries were dead in my scan tool, and my 2nd set of batteries weren't worth a damn either. I hopped in and tried to drive, and it drove fine. I headed to work, and after a few minutes the light went out. It flickered one more time very briefly about 20 minutes later, but otherwise seems fine.

Is it possible that I've just got a poor connection where the MEMCAL plugs into the ECM, or is this likely to be bigger things?

02-14-2006, 09:10 AM	#1
Jim85IROC Registered User Join Date: Dec 2004 Location: Readsboro, VT Posts: 502	Code 51: PROM Failure Not what I expected when I came out to the truck this morning. I started the truck and went back inside, and when I came back, the SES light was flashing at a very quick rate, which is something I've never seen a GM light do before. Of course the batteries were dead in my scan tool, and my 2nd set of batteries weren't worth a damn either. I hopped in and tried to drive, and it drove fine. I headed to work, and after a few minutes the light went out. It flickered one more time very briefly about 20 minutes later, but otherwise seems fine. Is it possible that I've just got a poor connection where the MEMCAL plugs into the ECM, or is this likely to be bigger things? __________________ 1987 GMC Sierra Classic 3500 454 TH400 My Sounddomain Page

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