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Old 02-01-2014, 14:52   #1 (permalink)
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02 sable p1504 code

Hello i have a 02 sable with a p1504 cel code ...i replaced the AIC valve.and reset the computer with my scan tool..it came rite back..i then removed the neg cable and placed a jumper from the positive cable to clear the memery after 10 minuets i started the car let it run and took it for a decent ride it runs and shifts great when i returned i shut it off and restarted it and it threw a CEL it was the p1504 it is a duratec 24 valve 3.0 any help would be great...i also thought i could hear a vaccume leak and sprayed the engine with brake cleaner and it didnt show any thing....any susjestions....????
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Old 02-01-2014, 17:46   #2 (permalink)
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Re: 02 sable p1504 code

A short in the wiring for the IAC can also throw the code. As far as the hissing, you may actually be hearing the air rushing past the throttle plate.
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Old 02-01-2014, 18:19   #3 (permalink)
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Re: 02 sable p1504 code

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Originally Posted by CatSkinner View Post
A short in the wiring for the IAC can also throw the code. As far as the hissing, you may actually be hearing the air rushing past the throttle plate.
At one point i thought it could be air in the throttle plate but it sounds like its comming from the back by the distributer i changed one 3/8 hose that goes to a valve unit on the firewall..no change...
there are 2 wires at the IAC do you know the voltegs that i should look for and if it was shorted would the car run as good as it does...and would it allow me to go for a 20 minuet ride without throwing a CEL....when i got back i shut the car off then restarted it and it threw a CEL ???

thanks I need all the help i can get..
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Old 02-07-2014, 22:18   #4 (permalink)
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Re: 02 sable p1504 code

This is going to sound strange but change the PVC valve. I've seen it numerous times. It sticks open causing unmetered air. Idle is raised so PCM backs out IAC. It s backs it off so much determines it has a problem an kicks MIL on. Seen it several times and always on 24v 3.0.


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