PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Throwing a PO650 & a P650 Pending??

Thread Tools
 
Search this Thread
 
Old Mar 9, 2011 | 05:21 PM
  #1  
jj62's Avatar
Thread Starter
Teching In
 
Joined: Nov 2009
Posts: 33
Likes: 0
From: Redlands, Ca
Default Throwing a PO650 & a P650 Pending??

Can anyone tell me why my ECM is throwing a PO650 and 650 pending code.
The MIL is not on and the scanner reports MIL off, but it continues to throw the codes?.
One guy told me that it maybe a ghost code from a bad wiring loom job and that the ECM maybe damaged.

Does that make any sense??????.......
Reply
Old Mar 9, 2011 | 09:38 PM
  #2  
Goldcuffs's Avatar
Teching In
 
Joined: Aug 2008
Posts: 20
Likes: 0
From: Edgewater FL
Default

A 650 is Malfunction indicator lamp control circuit. (Just in case you didn't know) Does the check engine light work? what I mean is does the bulb illuminate briefly when the key is turned on when the engine is off? If I read right this engine is transplanted into an El Camino right? What was it originally out of? (so I can get the proper wiring diagram)
Reply
Old Mar 9, 2011 | 11:07 PM
  #3  
jj62's Avatar
Thread Starter
Teching In
 
Joined: Nov 2009
Posts: 33
Likes: 0
From: Redlands, Ca
Default

Originally Posted by Goldcuffs
A 650 is Malfunction indicator lamp control circuit. (Just in case you didn't know) Does the check engine light work? what I mean is does the bulb illuminate briefly when the key is turned on when the engine is off? If I read right this engine is transplanted into an El Camino right? What was it originally out of? (so I can get the proper wiring diagram)
The engine is a 5.3 out of a 2005 Chevy Silverado.
The light doesn't illuminate when the key is in the on position.
Reply
Old Mar 9, 2011 | 11:30 PM
  #4  
01ssreda4's Avatar
TECH Senior Member
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (96)
 
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Default

Sounds like something isn't hooked up right....
Reply
Old Mar 10, 2011 | 12:24 PM
  #5  
jj62's Avatar
Thread Starter
Teching In
 
Joined: Nov 2009
Posts: 33
Likes: 0
From: Redlands, Ca
Default

Originally Posted by 01ssreda4
Sounds like something isn't hooked up right....
You know I thought that too. But I don't think that is the case anymore.
After the crap wiring loom job I had done. I send it off to Zac at Speed Scene Wiring in Tx, to striaghten out. All the codes have been cleared expect that one. he has given me things to check and do but nothing seems to help. Zac now things that the ECM could have been damaged as a result of the bad wiring and is retaining kinda of a ghost code. The MIL lite used to stay on all of the time, now it won't come on at all but throws
the code 650.
So until I throw more $$$$$ at it, I wanted some help and opinons from the members here at LS1 Tech.
Reply




All times are GMT -5. The time now is 12:28 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE