Thanks slayer!!!
GM Drivetrain code P1661???
Thread Starter
Race Director
Joined: Sep 2004
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
GM Drivetrain code P1661???
Can anyone inform me on what this is supposed to mean? It comes up as a manufacturer specific code so I went to the GM dealer to find out that WTF it meant. The service writer told me that it could be any of 10 things ranging from a faulty ground wire to a bad PCM. So how am I supposed to find out what's wrong?
Le Mans Master
Joined: Oct 2003
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From: Director of Bands
St. Jude Donor '08
I just looked up P1661 under the GM specific codes and it comes up: "MIL Control Circuit." Sounds like you may have an internal problem, or something is shorting itself out in there...
Hope this helps!
Hope this helps!
Thread Starter
Race Director
Joined: Sep 2004
Posts: 13,793
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
Originally Posted by eschoendorff
I just looked up P1661 under the GM specific codes and it comes up: "MIL Control Circuit." Sounds like you may have an internal problem, or something is shorting itself out in there...
Hope this helps!
Hope this helps!
well that sounds like a fat sack of suck!!! Thanks for the info. I'm not exactly what that means in terms of repairs 
1st Gear
Joined: May 2006
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p1661
Does you check engine light come on with a bulb check when you turn your key on??
If it dosent try to replace it,, If it does not light up after that most likely a ECM problem..
P1661 MIL Control Circuit Malfunction
Possible Causes Setting Conditions
1.MIL control circuit is open, shorted to ground or to power (B+)
2.MIL power circuit is open (check the GAUGES fuse)
3.MIL (bulb) is open or missing
4.PCM has failed
Key on or engine running, and the PCM detected the Actual and Commanded state of the MIL control circuit did not match for over 5 seconds during the CCM test.
This code sets in 1 Trip(s).
If it dosent try to replace it,, If it does not light up after that most likely a ECM problem..
P1661 MIL Control Circuit Malfunction
Possible Causes Setting Conditions
1.MIL control circuit is open, shorted to ground or to power (B+)
2.MIL power circuit is open (check the GAUGES fuse)
3.MIL (bulb) is open or missing
4.PCM has failed
Key on or engine running, and the PCM detected the Actual and Commanded state of the MIL control circuit did not match for over 5 seconds during the CCM test.
This code sets in 1 Trip(s).
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