2001 Pontiac Grand Prix ECM promblem

Tiny
DREW1988
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
Computer problem
2001 Pontiac Grand Prix V8 Front Wheel Drive Automatic

hello there my question is I when to autozone and had a computer check on my car which it detected the problem my check light engine is on and its say the ECM has detected an improper coltage level on the MIL circuit with the light commanded on. Can u please tell me what does this mean Thank YOU hope to hear you soon
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Friday, September 11th, 2009 AT 12:40 PM

10 Replies

Tiny
BRIAN 1
  • EXPERT
What was the code?Need to know before I can help.
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Friday, September 11th, 2009 AT 8:42 PM
Tiny
DREW1988
  • MEMBER
Oh sorry the code to this problem is P0650 thank you hope to hear u soon
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Saturday, September 12th, 2009 AT 3:10 PM
Tiny
BRIAN 1
  • EXPERT
The p0650 is an output driver fault within the pcm, an output driver is an internal ground inside the pcm. Before you replace the pcm check the MIL fuse first, it could be blown. If it isnt then you would be looking at a possible pcm problem, her is how it works, Output driver modules (ODMs) are used by the powertrain control module (PCM) to turn ON many of the current-driven devices that are needed to control various engine and transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding ON. Unlike the quad driver modules (QDMs) used in prior model years, ODMs have the capability of diagnosing each output circuit individually. DTC P0650 set indicates an improper voltage level on the output circuit that controls the malfunction indicator lamp (MIL).
Post back with what you find.
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Saturday, September 12th, 2009 AT 4:18 PM
Tiny
DREW1988
  • MEMBER
Oh thank u so much for the info but tell u the true I have no idea where to start and how to do it where is the pcm and which fuse to look for should I ask the dealer to do or do it myslef because for some reason my car will not start only when I press the gas and this problem I have is problemly the reason why hope too hear u soon
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Saturday, September 12th, 2009 AT 8:59 PM
Tiny
BRIAN 1
  • EXPERT
The the I/p ignition fuse is located in the fuse panel at the instrument panel on the side of the dash, and the ECM fuse is in the same location, just check to see if there blown. As far as the car starting that would be a different problem, check the fuel pressure, if you have to push the gas pedal to start it, thats more of a fuel issue. You can do this stuff on your own or take it to the dealer, the choice is yours, if you dont think this is something you can do than take it to the dealer.
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Saturday, September 12th, 2009 AT 9:16 PM
Tiny
DREW1988
  • MEMBER
Ok thank u for everything I wish u guys were located in miami fl thee are nobody as good as u guys thank u
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Sunday, September 13th, 2009 AT 3:47 PM
Tiny
DREW1988
  • MEMBER
Hello I found where the fuse were there still good so do I have too buy a new pcm or check for something else hope too hear u soon.
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Sunday, September 13th, 2009 AT 4:08 PM
Tiny
BRIAN 1
  • EXPERT
I would also check for corrosion at the PCM harness at the PCM,here is where the pcm is,


http://www.2carpros.com/forum/automotive_pictures/147643_pcm_2.jpg

the pcm is number 4. in all you will probably be replacing the pcm,if you do it needs to be programmed.sorry I wish I was in miami,im in NY.
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Monday, September 14th, 2009 AT 6:50 PM
Tiny
DREW1988
  • MEMBER
Ok one more question what is pcm called and how much do u think it cost to buy one is a Engine Control Module or something else
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Tuesday, September 15th, 2009 AT 1:42 AM
Tiny
BRIAN 1
  • EXPERT
Its just called an ECM, it costs about $400.00 for just the ecm, installed and programmed probably $500.00 to $600.00.
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Tuesday, September 15th, 2009 AT 5:07 PM

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