Pontiac grand am dtc p1606

marcfritch
Posts: 1
Joined: Wed Jul 03, 2013 8:41 am

Pontiac grand am dtc p1606

Unread post by marcfritch » Wed Jul 03, 2013 8:48 am

I have a 1996 Pontiac grand am with the 2.4 l motor does not start cranks only pulled dtc code p1606 motor has no spark and fuel pressure is soso when cranking security comes on and does not go out where to I go to fix the problem ipc gas gauge is full

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carriedi
Posts: 2573
Joined: Wed Apr 10, 2013 12:42 pm

Re: Pontiac grand am dtc p1606

Unread post by carriedi » Wed Jul 03, 2013 1:19 pm

if the security light is coming on the car may not start because of the anti-theft module. you may have to see if you can relearn your key. Scan for codes in the passlock with a tech2 scanner

p1606 is for a serial communication loss for device #6
that means that a device that the pcm is looking for is not responding. the pcm did not get a 25 valid responses from a device and the system voltage was over 6.8 volts. Need to find out what is not communicating.
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