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Old 04 Mar 2008, 06:27 am
quicksilverdon quicksilverdon is offline
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Join Date: Nov 2003
Location: Phillipsburg, NJ, USA.
Posts: 4,379
Default Re: Malfunction indicator light

Quote:
Originally Posted by purple04 View Post
P1604 is "PCM internal dual-port RAM read/write integrity failure". The test checks for power to the PCM with key on. If the power supply is okay, you replace the PCM, period. [:O] Sounds like you have an intermittent power problem or the PCM is dying internally. You could check connections, but this should be covered under warranty.
Where'd you find that?
"P1604 Loss of IPC serial data"
Son-in-law's '03 GT got it. (the P1604)
Car runs fine.
I told him to take it to a parts store that'll plug in for free see if there's more info.

All he said what he was starting, and let the key go before it fully caught, and got the check engine light. Started the car but light stayed on.
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