Starting Problem
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Joined: Aug 2003
Posts: 54
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From: Eden Prairie MN
Starting Problem
I have a 99 Roadster that will occasionally not start. You turn the key and it is dead. The battery is good and after a few tries it will start.
I get the following fault codes.
B2721 Pass-Key Detectopm Circuit
P1631 Theft Deterrent System Password Incorrect-C
U1016 Loss of Communications with PCM
U1064 Loss of Communications with DCM
U1096 Loss of Communications with IPC
Can anyone help me
I get the following fault codes.
B2721 Pass-Key Detectopm Circuit
P1631 Theft Deterrent System Password Incorrect-C
U1016 Loss of Communications with PCM
U1064 Loss of Communications with DCM
U1096 Loss of Communications with IPC
Can anyone help me
Tech Contributor
Joined: May 2003
Posts: 7,035
Likes: 134
From: North Augusta, SC
Re: Starting Problem (AMERDRM)
I would put my money on one of the following:
1 - The resistor on your key is either slightly damaged or dirty/corroded to the point where it isn't reading as the proper resistance any more. Try using the other key for a while to see if the problem goes away. BTW, your car WILL NOT start for 3 minutes after you get the B2721 code, and every time you try again it just restarts the 3 minutes.
2 - Since you got all of the loss of coms codes, there might be a loose connector somewhere, probably under the steering wheel. Have you recently installed a CLB or anything else that would have had you messing with connectors anywhere inside the car?
If you figure it out, let us know what the problem was.
Good luck. :cheers:
1 - The resistor on your key is either slightly damaged or dirty/corroded to the point where it isn't reading as the proper resistance any more. Try using the other key for a while to see if the problem goes away. BTW, your car WILL NOT start for 3 minutes after you get the B2721 code, and every time you try again it just restarts the 3 minutes.
2 - Since you got all of the loss of coms codes, there might be a loose connector somewhere, probably under the steering wheel. Have you recently installed a CLB or anything else that would have had you messing with connectors anywhere inside the car?
If you figure it out, let us know what the problem was.
Good luck. :cheers:
Le Mans Master
Joined: Jan 2001
Posts: 5,012
Likes: 508
From: Hilton NY
Re: Starting Problem (markcz)
Another possibility is the wiring harness under the console. My '98 wouldn't start when the console was on but would start when it was removed; I retaped the wiring harness in that area and made sure the wires were off to the right of the cup holdern so the console wouldn't pinch them.
